Category: Activity Report

Came back out at dawn for the next Grand eruption. The One Burst Grand lasted twelve minutes, and it finally didn't have a Turban Interval delay and erupted with a shorter interval. Otherwise it was just another cold and steamy eruption.

2025-May-31 : 06:23:13 G1Q

 06:23:13	B1	--- d=12m01s
 06:24:09	Turban	0m56s
 06:26:56	Vent	3m43s
 06:35:14	P1	12m01s
 06:36:06	V&T Quit	12m53s

				     	ΣD=12m01s
	* * * * *
 06:03:08			d=01m27s 	
		      Grand: 20m05s

The day was clear and warming rapidly, and there had been no report on Aurum in over a day, so I decided to go there and record an hour or so of video with the hope of catching an eruption. About an hour later we were rewarded with just that, a nice, strong eruption that seemed to last longer than the 1m16s it actually did.

From there stopped by Beehive to kill a little time with little expectation of seeing an eruption, but didn't have to wait long for the Indicator to start. During that time, as the crowd got larger, I was assessing the winds, and trying to figure out the best place to avoid getting wet. My efforts were wrong, as I got drenched and the umbrella when deployed was of little help.

Still damp, headed out to Grand. Once again we got a short interval before the One Burst Grand eruption. At just under 8m10s there was a long false pause, followed by another 2-1/2 minutes of strong activity (not the usual Big Sawmill). Afterwards West Triplet was in heavy overflow with thumps and some small splashes.

2025-May-31 : 12:53:19 G1Q

 12:53:09	Boop	-0m10s
 12:53:19	B1	--- d=10m46s
 12:54:10	Turban	0m51s
 12:57:04	Vent	3m45s
 13:01:28	FP	8m09s
 13:04:05	P1	10m46s
 13:05:02	V&T Quit	11m43s

				     	ΣD=10m46s
	* * * * *
 12:12:23			
 12:32:57	Int: 20m34s	d=04m31s 	
		      Grand: 20m22s

That's when Castle started to have a major eruption. Waited and watched that as it turned to steam before heading in.

Later in the afternoon it appears the bears we saw a week ago were back in the area. Heard over the NPS radio that at first they was causing a traffic backup south of Biscuit Basin. Then they were seen headed south toward Punchbowl and Black Sand Basin along the Daisy to Biscuit bike trail.

It was well before sunset, but went out for the next Grand eruption with the expectation of it happening in the dark. The second Turban of the wait not only was a Turban Delay Interval, but had several boops.

While the Delay interval was in progress, a bison appeared over between Rift and the walkway. It just stupidly stood there as only a bison can for at least fifteen minutes. Finally, just before Turban started to erupt, it began to move toward Grand and the hillside. With Turban erupting, it slowly made it way along the base of the hill. The rim of Grand's crater lies right at the base of the big rock. The bison walked in front of the walk, then ignored Turban and proceeded on until it finally encountered the grassy area to the north.

A couple of Turban intervals later two more bison appeared on the boardwalk by Belgian Pool. These two moved a bit faster, with one going behind Grand and the big rock, while the other passed in front of Percolator and crossed the runoff channel. Once again, they ignored activity from Turban.

It wasn't until the sixth Turban after the Delay that we finally got our Grand eruption. The sun had long set, but it was still bright out, and not too cold. The Turban start of the eruption was explosive, with Vent starting to overflow almost immediately. Grand booped several times before it also began to erupt. It was dead calm, so the highest jets had to clear the growing steam cloud, which then turned into a nice rolling base surge.

Eight minutes into the eruption Grand had a false pause. But it did manage to finally stop at just under 9-1/2 minutes. It was difficult to see, but it appeared there was water in Grand's vent. It was a long pause, and the second burst was just long enough to qualify for the Long designation.

2025-May-31 : 21:09:39 D6/T2*Q

 21:09:13	Turban	-0m26s
 21:09:16	Vent Ovfl	-0m23s
 21:09:34	Boop	-0m05s
 21:09:39	B1	---    d=09m24s
 21:12:13	Vent	2m34s
 21:17:42	FP	8m03s
 21:19:03	P1	9m24s  d=52s
 21:19:55	B2	10m16s d=01m18s
 21:21:13	P2	11m34s
 21:21:59	V&T Quit	12m20s

				     ΣB=10m42s	ΣD=11m34s
	* * * * *
 18:50:29			d=04m36s 	
 19:23:17	Int: 32m48s	d=04m03s  D0 Boop: 19:18:51	
 19:39:19	Int: 16m02s	d=04m10s  D1	
 19:57:24	Int: 18m05s	d=04m20s  D2	
 20:16:52	Int: 19m28s	d=03m59s  D3	
 20:35:36	Int: 18m44s	d=03m48s  D4	
 20:52:00	Int: 16m24s	d=03m40s  D5	
		     Turban: 17m13s

Got out to Grand just before midnight, and in the few minutes before Turban erupted there was no sound of overflow coming from Grand. It was the same for the next Turban eruption. It appears that we arrived just in time for the first Turban eruption after a Turban Delay interval. If that was the case, then we finally got the One Burst Grand Eruption after seven Turban intervals. WHile not as steamy as the previous night, it was not possible to see the starts of Vent and Turban.

2025-May-30 : 01:36:04 G1C

 01:36:04	B1	--- d=10m20s
 01:46:24	P1	10m20s
Vent & Turban continue

				     	ΣD=10m20s
	* * * * *
Yesterday  23:45:07			d=04m22s 	
 00:04:02	Int: 18m55s	d=04m07s 	
 00:22:45	Int: 18m43s	d=04m07s 	
 00:43:20	Int: 20m35s	d=03m44s 	
 01:01:25	Int: 18m05s	d=03m42s 	
 01:18:11	Int: 16m46s	d=03m29s 	
		      Grand: 17m53s

In the morning, went out to Grand at sunrise, just in case there was a short interval. Only had to wait an hour for a long Delay Turban interval, but fortunately Grand's pool refilled. That took almost 1-1/2 minutes. The One Burst Eruption lasted 8-1/2 minutes, and Grand made no attempt to have a second burst.

2025-May-30 : 08:58:40 D0/T1C

 08:57:13	Turban	-1m27s
 08:58:36	Vent Ovfl	-0m04s
 08:58:40	B1	--- d=08m30s
 09:00:52	Vent	2m12s
 09:07:10	P1	8m30s
Vent & Turban continue

				     	ΣD=08m30s
	* * * * *
 08:02:54			d=03m53s 	
 08:25:17	Int: 22m23s	d=04m11s 	
		     Turban: 31m56s

Down at Economic the pool was almost exactly at the point of overflow. The area around was wet, so this may have been higher until just recently.

With nothing much going on, decided that since it had been well over 24 hours, it ws a good time to check in with Artemisia. On the way, as always, stopped by to check on East Sentinel. It was as I've never seen it before-- completely quiet. No evidence of any boiling along the edges. The pool was in good overflow when we walked up, but then suddenly dropped about 4cm below overflow. Then it slows rose back and started overflow a bit once again.

Artemisia was full, and we waited only about 2-1/2 hours for an eruption. The wind mostly cooperated for video taking. Early in the eruption Atomizer had a minor eruption.

On the way back from Artemisia, East Sentinel appeared unchanged.

The wait for the third Grand eruption of the day was uneventful. Once again after a few Turban eruption intervals we got a Turban Delay Interval, which resulted in Grand erupting. For well over a minute Grand was pulsating and pouring off water before we finally got the first boop. At the end Grand had water in the crater for maybe 20 seconds before finally dropping.

2025-May-30 : 16:03:06 D0/G1C

 15:01:53			d=03m53s 	
 15:20:24	Int: 18m31s	d=03m28s 	
 15:36:36	Int: 16m12s	d=03m31s 	
Vent & Turban continue

In the early evening I to wait about 20 minutes to get onto Geyser Hill due to a couple bison who crossed over the boardwalks at the junction heading in opposite directions. Once there, didn't have a long wait for Beehive to erupt.

The Indicator was not erupting when there began a long sustained surge. After several seconds, it built into a sudden start. The eruption was long, lasting nearly six minutes, and there was a nice rainbow from the northern end of the benches.

Went out to Grand with the expectation of having a four Grand eruption day, as the six hour mark was at 22:00. Grand ended up having a five Turban Delay interval, erupting on the last possible opportunity. Then the One Burst Grand eruption, lasting only 9-1/2 minutes, had Vent & Turban quitting. All nicely disappointing.

2025-May-30 : 23:50:33 D5/G1Q

Yesterday  23:50:27	Boop	-0m06s
Yesterday  23:50:33	B1	--- d=09m31s
Yesterday  23:51:24	Turban	0m51s
Yesterday  23:53:59	Vent	3m26s
 00:00:04	P1	9m31s
 00:01:52	V&T Quit	11m19s

				     	ΣD=09m31s
	* * * * *
Yesterday  22:16:03			d=04m32s  D0	
Yesterday  22:32:15	Int: 16m12s	d=04m16s  D1	
Yesterday  22:51:52	Int: 19m37s	d=04m22s  D2	
Yesterday  23:12:14	Int: 20m22s	d=03m20s  D3	
Yesterday  23:28:41	Int: 16m27s	d=03m56s  D4	
		     Turban: 21m46s

There was a report of a rumor that an aurora was visible, do headed out to Grand a little earlier than originally planned. All I could see was glow along the northern horizon, so it wasn't much and didn't last long.

Then waited an hour for the One Burst Grand eruption, which again lasted under 11-1/2 minutes. The Grand eruption seemed foggier than usual for an eruption at that time of day. Nowhere along the boardwalk was there a place where fog didn't obscure and scatter the beam of light coming from the light.

2025-May-29 : 00:49:01 G1Q

 00:49:01	B1	--- d=11m22s
 00:49:54	Turban	0m53s
 00:52:45	Vent	3m44s
 01:00:23	P1	11m22s
 01:01:24	V&T Quit	12m23s

				     	ΣD=11m22s
	* * * * *
Yesterday  23:46:01			d=04m34s 	
 00:06:19	Int: 20m18s	d=04m40s 	
 00:25:21	Int: 19m02s	d=04m05s 	
		      Grand: 23m40s

Got out early in the morning in case there was another short interval. Instead, after about an hour, got a Turban Delay interval. The One Burst Grand eruption finally came seven Turban eruption intervals later. This time the eruption lasted less than ten minutes, a slight change from the recent One Burst Grand eruptions.

2025-May-29 : 09:35:00 D7/G1C

 09:34:50	Boop	-0m10s
 09:35:00	B1	--- d=09m49s
 09:35:35	Turban	0m35s
 09:36:20	Vent Ovfl	1m20s
 09:38:07	Vent	3m07s
 09:44:49	P1	9m49s
Vent & Turban continue

				     	ΣD=09m49s
	* * * * *
 06:48:12			d=04m56s 	
 07:07:28	Int: 19m16s	d=04m04s 	
 07:34:35	Int: 27m07s	d=04m37s  D0	
 07:52:21	Int: 17m46s	d=04m07s  D1	
 08:10:40	Int: 18m19s	d=04m12s  D2	
 08:29:17	Int: 18m37s	d=03m50s  D3	
 08:45:05	Int: 15m48s	d=03m30s  D4	
 09:01:32	Int: 16m27s	d=03m13s  D5	
 09:17:51	Int: 16m19s	d=03m43s  D6	
		      Grand: 17m09s

During that wait I checked on Economic. It was still just below overflow. The area around was wet, and it might have had a slight trickle on the southwest side.

The Bijou Monkey Cage by Giant has been rebuilt exactly as it was before, with the benches and large sign in the same locations.

For no apparent reason, in the afternoon Grand had an eight hour interval prior to another One Burst Eruption. Midway through the wait the weather to the northwest started to look bad, and the radar maps showed an approaching storm. But the storm never really materialized, it was just windy with occasional sprinkles.

2025-May-29 : 17:36:54 G1C

 17:36:50	Vent Ovfl	-0m04s
 17:36:54	B1	--- d=09m45s
 17:37:01	Turban	0m07s
 17:39:55	Vent	3m01s
 17:46:39	P1	9m45s
Vent & Turban continue

				     	ΣD=09m45s
	* * * * *
 15:10:20			
 15:25:46	Int: 15m26s	d=04m42s 	
 15:46:45	Int: 20m59s	d=04m17s 	
 16:05:48	Int: 19m03s	d=03m05s 	
 16:23:13	Int: 17m25s	d=04m03s 	
 16:42:56	Int: 19m43s	
 17:02:02	Int: 19m06s	d=03m57s 	
 17:20:14	Int: 18m12s	d=03m03s 	
		      Grand: 16m40s

A report at 0500 of Vent & Turban in eruption let me know that the overnight Grand eruption was somewhere around 0400, and there was no need to rush out.

Got out to Grand just in time for a Turban Delay interval which included a nice boop from Grand. Went down to check on Economic, and it was about 2cm below overflow, but still convecting slightly and it was wet all around the outside of the rim.

The Delay at Grand only lasted four Turban intervals, and the One Burst Grand lasted almost 11 minutes. West Triplet was overflowing heavily after the eruption, but I didn't see any splashes or feel any thumps.

2025-May-28 : 11:08:26 D4/G1Q

 11:08:22	Boop	-0m04s
 11:08:26	B1	--- d=11m51s
 11:08:53	Vent Ovfl	0m27s
 11:09:10	Turban	0m44s
 11:11:59	Vent	3m33s
 11:20:17	P1	11m51s
 11:21:22	V&T Quit	12m56s
 11:28:17	V&T Restart	19m51s

				     	ΣD=11m51s
	* * * * *
 09:50:54			d=05m43s  D0 Boop: 09:47:30	
 10:08:56	Int: 18m02s	d=04m18s  D1	
 10:28:57	Int: 20m01s	d=04m27s  D2	
 10:47:35	Int: 18m38s	d=04m16s  D3	
		      Grand: 20m51s

Was intending to go out to Geyser Hill as it was probably time for Beehive, and spend some time at Aurum. That was when I heard the report of Aurum erupting. So instead waited maybe 45 minutes for the start of Beehive's Indicator. The conditions were excellent, with some wind but not enough to matter that close. The duration of the eruption was longer than typical, at 5m16s.

It was a short wait for the next One Burst Grand eruption. Nothing much to say about it, other than it lasted almost 11-1/2 minutes. It was followed by a few splashes from West Triplet.

2025-May-28 : 17:59:20 G1Q

 17:59:16	Boop	-0m04s
 17:59:20	B1	--- d=11m26s
 17:59:56	Vent Ovfl	0m35s
 18:00:13	Turban	0m53s
 18:02:52	Vent	3m32s
 18:10:46	P1	11m26s
 18:11:32	V&T Quit	12m11s

				     	ΣD=11m26s
	* * * * *
 16:54:24			d=04m16s 
 17:16:26	Int: 22m02s	d=05m01s 	
 17:37:20	Int: 20m54s	d=04m42s 
		      Grand: 21m59s

Afterwards caught the start of Sawmill, and then stuck around for about 1-1/2 hours hoping to see Uncertain erupt. Instead decided to leave when Castle started. With the sun low, there were some strong rainbows, along with a curtain of mist across the bike trail. (Uncertain finally erupted just after we left Castle.)

With Rift still in erution when I left, I expected a long interval. Came out around the 7h45m mark and found Grand to be full. An hour later it was still full, and then it had a Turban Delay interval. This lead to three more Turban eruptions before Grand finally had a good fill.

Even then, Grand took its time and waited well over a minute before starting to erupt. That burst lasted less than eight minutes. But once again, any hopes of three or more bursts were dashed by a second burst lasting over 2-1/2 minutes.

2025-May-27 : 07:46:33 D4/T2*Q

 07:45:23	Turban	-1m10s
 07:45:37	Vent Ovfl	-0m56s
 07:46:33	B1	--- d=07m49s
 07:48:42	Vent	2m09s
 07:54:22	P1	7m49s d=35s
 07:54:58	B2	8m25s d=02m39s
 07:57:37	P2	11m04s
 07:58:29	V&T Quit	11m56s

				     ΣB=10m28s	ΣD=11m04s
	* * * * *
 05:29:07			d=03m47s 	
 05:49:40	Int: 20m33s	d=03m47s 	
 06:08:48	Int: 19m08s	d=03m37s 	
 06:38:17	Int: 29m29s	d=04m24s  D0	
 06:54:22	Int: 16m05s	d=03m18s  D1	
 07:10:25	Int: 16m03s	d=03m29s  D2	
 07:28:02	Int: 17m37s	d=04m03s  D3	
		     Turban: 17m21s

Coming back, there were two bison right next to the bike trail below Castle. One wanders off to the north/left to bed down near the trees. The other just stupidly stood right on the edge of the trail for 15 minutes until finally shuffling off to bed down just far enough away that we could go by.

Around noon went out to catch an eruption of Uncertain, and didn't have to wait long. Even though Sawmill had started, Uncertain started overflowing heavily and within two minutes Uncertain's eruption started.

Returned to the cabin to reconfigure for the wait at Grand, and just when I was ready to leave found a bison grazing away next a cabin across the road for our cabin. Got out of there quickly, only to encounter a second bison by the biketrail across from the store. At least there was a bypass available.

The wait at Grand started out nice enough, but over the next two hours of Turban eruptions the weather deteriorated. It got quite windy with slowly building showers. The wind knocked Grand's water column well to the southeast, but the direction didn't take it over the boardwalk. We got another two burst eruption, once again with a pause lasting nearly a minute. It wasn't long after the eruption that the wind died down completely and the rain stopped.

2025-May-27 : 15:30:42 G2C

 15:30:37	Boop	-0m05s
 15:30:42	B1	--- d=08m35s
 15:30:47	Vent Ovfl	0m05s
 15:31:00	Turban	0m18s
 15:33:45	Vent	3m03s
 15:39:17	P1	8m35s d=57s
 15:40:14	B2	9m32s d=40s
 15:40:54	P2	10m12s
Vent & Turban continue
				     ΣB=09m15s	ΣD=10m12s
	* * * * *
 13:36:10			d=05m08s 	
 13:54:12	Int: 18m02s	d=04m25s 	
 14:14:24	Int: 20m12s	d=04m18s 	
 14:33:43	Int: 19m19s	d=04m07s 	
 14:52:56	Int: 19m13s	d=03m33s 	
 15:11:38	Int: 18m42s	d=03m36s 	
		      Grand: 19m04s

There was still plenty of light as was locking up my bike. I looked over to see Sawmill erupting, and saw Grand start to do the same. The interval was under six hours. Walked over to see the rest of the eruption, which turned out to be another two burst with a long pause and a fairly long second burst.

2025-May-27 : 21:23:28 2Q

 21:23:28	B1	--- d=09m15s
 21:32:43	P1	9m15s d=52s
 21:33:35	B2	10m07s d=1m04s
 21:34:39	P2	11m11s
 21:35:53	V&T Quit
				     ΣB=10m07s	ΣD=11m11s

Woke up at dawn with no reports for any geyser activity. It being 7-1/2 hours, decided to find out for certain if Grand had erupted, and if it hadn't, figure on a short interval.

Arrived just as Turban started to erupt. No Grand eruption and the pool was full. The following Turban eruption interval was just over 15 minutes. Such a short Turban interval late in the Grand interval implied that Grand would erupt at the end of this Turban interval.

And it did. Once again the steam was pushed aside enough to be able to see the start of Grand and Vent clearly. For the last two minutes or so of the eruption Grand went into Big Sawmill mode. With the fog and steam it was hard to tell when the first burst quit. And at 9m42s, it was long enough for a One Burst Eruption. But after nearly a minute, the start of the second burst could be heard through the fog.

2025-May-26 : 06:11:46 T2Q

 06:11:30	Turban	-0m16s
 06:11:46	B1	--- d=09m42s
 06:14:25	Vent	2m39s
 06:21:28	P1	9m42s d=52s
 06:22:20	B2	10m34s d=48s
 06:23:08	P2	11m22s
 06:23:52	V&T Quit	12m06s

				     ΣB=10m30s	ΣD=11m22s
	* * * * *
 05:37:22			d=03m04s 	
 05:53:02	Int: 15m40s	d=03m19s 	
		     Turban: 18m28s

West Triplet started to erupt at some point near the end of the Grand eruption, with many splashes but not much thumping.

Decided to spend some time on Geyser Hill as Beehive could be due soon. Didn't have to wait long. Didn't see any rainbows because I decided to not risk getting wet at that end of the walkway, although it only misted down there.

Afterwards, went over to wait on Aurum. Spent an hour trying to record an eruption start without success. (It erupted about 20 minutes after I left.)

Went out for the next Grand eruption a bit early because it was time for Uncertain. Didn't have long to wait.

From there, headed over to Grand where I probably saw a Turban eruption that concluded a Turban Delay Interval. If that was the case, then we then got to experience a four Turban interval delay. The first burst of the Grand eruption lasted only 7-1/2 minutes. I remarked that we were about to see either a two-star, a three or a four burst eruption. We got the two-star, and the second burst lasted almost 2-1/2 minutes.

Following the eruption, West Triplet again had a heavy overflow with some splashing, but no thumping.

2025-May-26 : 13:10:29 G2*Q

 13:10:29	B1	--- d=07m33s
 13:10:33	Vent Ovfl	0m04s
 13:11:08	Turban	0m39s
 13:13:33	Vent	3m04s
 13:18:02	P1	7m33s d=16s
 13:18:18	B2	7m49s d=02m24s
 13:20:42	P2	10m13s
 13:21:43	V&T Quit	11m14s

				     ΣB=09m57s	ΣD=10m13s
	* * * * *
 11:53:36			d=05m39s 	
 12:12:29	Int: 18m53s	d=04m16s 	
 12:31:45	Int: 19m16s	d=04m09s 	
 12:51:17	Int: 19m32s	d=03m38s 	
		      Grand: 19m12s

Then waited for Castle, because the interval since last night's eruption was well over 17 hours. It ended up over 18 hours, and we got a minor eruption that lasted just under four minutes.

Arrived at Grand for the evening eruption a bit early, and probably saw the end of the Turban Delay Interval, since the Turban eruption lasted nearly six minutes, and the following Turban eruption was not preceeded by any overflow from Grand.

About an hour later, West Triplet began to erupt. As this was the first true eruption I'd seen, I wasn't surprised that Rift started shortly afterwards. At the same time, Castle started to erupt, the followup to the afternoon's minor eruption.

Until West Triplet quit erupting, Percolator was also in eruption. That was the first activity I've seen from it in at least a couple of years.

It took three Turban eruption intervals after the start of Rift before Grand erupted. This One Burst Eruption lasted exactly eleven minutes, but there was about three minutes of Big Sawmill at the end.

2025-May-26 : 21:41:02 T1Q

 21:40:26	Turban	-0m36s
 21:40:58	Boop	-0m04s
 21:41:02	B1	--- d=11m00s
 21:43:30	Vent	2m28s
 21:52:02	P1	11m00s
 21:53:00	V&T Quit	11m58s

				     	ΣD=11m00s
	* * * * *
 19:16:18			d=05m44s 	
 19:34:15	Int: 17m57s	d=04m14s 	
 19:52:53	Int: 18m38s	d=03m42s 	
 20:10:12	Int: 17m19s	d=04m26s 	
 20:29:02	Int: 18m50s	d=03m54s 	
 20:45:58	Int: 16m56s	d=03m59s 	
 21:04:40	Int: 18m42s	d=03m24s 	
 21:22:46	Int: 18m06s	d=03m52s 	
		     Turban: 17m40s

Rift was still in eruption when I left, so I expect the next Grand interval to be long.

No reports of any geyser activity during the night, so I headed out to Grand at dawn. There was frost on all the cars in the Lodge cabin area, and the frost was starting to form on the boardwalks by Rift and Grand.

West Triplet was in overflow. Grand was also nicely in overflow, so I knew that it had been at least 4-1/2 hours since the previous eruption. Turban didn't erupt for another 19 minutes, a good indication that I had just witnessed a Turban Delay interval.

It took three more Turban eruption intervals before we got a second delay. This one was just over 25 minutes. It was cold, so the view was steamy, but there wasn't much rain on the northern end of the boardwalk, so I could see Turban and Vent from there.

The first burst lasted exactly 9-1/2 minutes, which is more than long enough, but after almost a minute, we got a nicely backlighted second burst. One that lasted for nearly 2-1/2 minutes. Vent & Turban quit with 15 second of the end of the eruption.

2025-May-25 : 07:19:03 D0/G2*Q

 07:19:03	B1	--- d=09m30s
 07:19:25	Turban	0m21s
 07:22:16	Vent	3m12s
 07:28:34	P1	9m30s d=58s
 07:29:31	B2	10m28s d=02m25s
 07:31:56	P2	12m53s
 07:32:13	V&T Quit	13m09s

				     ΣB=11m56s	ΣD=12m53s
	* * * * *
 06:15:20			d=05m13s 	
 06:33:47	Int: 18m27s	d=04m33s 
 06:53:56	Int: 20m09s	d=04m27s 
		      Grand: 25m06s

Since Castle wasn't acting like it had had a minor before I arrived this morning, and it was almost 18 hours since the previous eruption, and it was a nice clear and calm morning, decided to wait for the eruption. Waited well over an hour. The eruption was nicely backlighted also, while it lasted. The minor eruption lasted 2m36s, with only one preliminary pause before the end. There was very little splashing for the next few minutes, indicating that there wasn't going to be any sort of restart.

While cooking some breakfast this morning, we were stalked by a raven looking for an easy meal. It sat on the peak of the cabin roof, clucking and squawking at us, looking for an opportunity to drop down. It finally gave up only after I put the folding table back inside the truck.

For the mid-day Grand the wait was only about an hour. Nothing out of the ordinary about the One Burst Grand eruption until just before the ten minute mark. Then there was a long false pause whose restart got cheers from the crowd who didn't know better. The eruption lasted another minute, followed by a quick restart from Vent & Turban.

2025-May-25 : 14:17:16 G1Q

 14:17:16	B1	--- d=10m50s
 14:17:38	Vent Ovfl	0m22s
 14:17:52	Turban	0m36s
 14:20:40	Vent	3m24s
 14:27:01	FP	9m45s
 14:28:06	P1	10m50s
 14:29:10	V&T Quit	11m54s
 14:38:55	V&T Restart	21m39s

				     	ΣD=10m50s
	* * * * *
 12:58:02			d=03m37s 	
 13:15:26	Int: 17m24s	d=04m11s 	
 13:35:21	Int: 19m55s	d=04m28s 	
 13:55:48	Int: 20m27s	d=04m30s 	
		      Grand: 21m28s

Shortly after West Triplet, which had been in overflow, had a few burst about a meter high. The overflow continued for another couple of minutes. The Belgian Pool water level was up to the rim again.

In the afternoon decided to visit Geyser Hill just before the call for the Indicator came over the radio. There was little wind, so no one got wet on the walkways. After, tried to walk around the rest of Geyser Hill, but was blocked over between Aurum and Pump by a couple of bison grazing just close enough to the walkway.

Castle finally recovered from this morning's minor eruption as I was heading out for the evening Grand eruption. The Sawmill Group was high, with Churn in overflow and Sawmill nearly so. West Triplet had just finished another period of overflow. Caught an eruption of Turban and was going to see if Sawmill was still close to overflow when it started to erupt.

The next Turban eruption interval was a Delay Interval. At around 26 minutes Grand had a series of boops, some as high as two meters. It took another five minutes before Grand's pool finally subsided and Turban erupted.

It was a three Turban Interval delay. It was still light enough to see and the wind from the north pushing the steam to the right helped. The first burst lasted just over ten minutes. There was a pause of nearly a minute and then a nice tall second burst that spiked repeatedly above the steam clouds below it.

2025-May-25 : 21:46:34 D3/G2Q

Yesterday  21:46:34	B1	--- d=10m02s
Yesterday  21:47:24	Turban	0m50s
Yesterday  21:50:04	Vent	3m30s
Yesterday  21:56:36	P1	10m02s d=55s
Yesterday  21:57:31	B2	10m57s d=01m01s
Yesterday  21:58:32	P2	11m58s
Yesterday  21:59:23	V&T Quit	12m49s

				     ΣB=11m03s	ΣD=11m58s
	* * * * *
Yesterday  20:17:05			d=04m45s 	
Yesterday  20:50:24	Int: 33m19s	d=04m49s  D0 Boop: 20:43:23	
Yesterday  21:06:37	Int: 16m13s	d=05m01s  D1	
Yesterday  21:26:05	Int: 19m28s	d=04m17s  D2	
		      Grand: 20m29s

The days started the way many do-- with a call of "water in Beehive's Indicator". Got out in plenty of time. There was a breeze blowing the spray across the river and onto the overlook. This meant we had a strong half double rainbow most of the eruption.

A few hours later, it was time again to go out to Grand. Sawmill was in eruption, while Belgian was full and West Triplet was in overflow. A quick check on Economic showed that it was unchanged from yesterday, overflowing in several directions with a hint of convection over the vent.

Only had to wait for two Turban eruption intervals before we got our Grand eruption. This was my first two burst eruption of the trip, lasting just under 10-1/2 minutes, with Vent & Turban continuing after. During the wait for Grand I noticed that West Triplet was in overflow at least once, and overflow started during this Grand eruption.

2025-May-24 : 11:46:42 G2C

 11:46:37	Vent Ovfl	-0m04s
 11:46:40	Boop	-0m01s
 11:46:42	B1	--- d=08m57s
 11:46:54	Turban	0m11s
 11:49:50	Vent	3m07s
 11:55:40	P1	8m57s d=39s
 11:56:18	B2	9m36s d=37s
 11:56:56	P2	10m13s
Vent & Turban continue

				     ΣB=09m34s	ΣD=10m13s
	* * * * *
 10:48:41			d=04m26s 	
 11:09:21	Int: 20m40s	d=04m31s 	
 11:27:38	Int: 18m17s	d=04m03s 	
		      Grand: 19m04s

After lunch it was time to visit more of the basin beside the walkway from Castle to Grand. I caught a Rocket eruption as I stopped a the bike rack by Grotto. I then discovered that the Bijou Monkey Cage was no longer there, but under reconstruction. At least it appears they are going to rebuild it as it was before.

Did a quick check on Fan & Mortar just to see that nothing has happened there in the last few days. Then headed over to Daisy.

I found that Splendid was full. There was water being pushed into the northern (left) lobe where Splendid's runoff channels begin. Large ripples on the pool, but I never saw any boiling during the lead-up to the Daisy eruption. About ten minutes before Daisy, Splendid began to drop such that when Daisy started, the lobe was empty of water. Despite a strong wind, Daisy had an interval just over 100 minutes.

After Daisy, the refill of Splendid didn't look much different from previous visits. Most of the boiling during the fifteen minutes of observation was from the Side Boiler, with single, infrequent bursts from the Main Vent.

The Sawmill eruption I'd seen while headed to Grand earlier resulted in a deep drain at the Sawmill Group. Sawmill and Uncertain were both quiet when I arrived, but a few minutes later Sawmill had an eruption lasting about 25 seconds. That seemed to help stimulate Uncertain. Just as it was starting to look promising, Sawmill started, and proceeded to erupt for about 26 minutes. The activity from Uncertain died down during the first few minutes of the eruption, and it did nothing for about 15 minutes. Then splashing started up, and it appeared we might even get a dual eruption with Sawmill.

When Sawmill did quit, the activity in Uncertain increased. It seemed to stall during a short Tardy eruption a couple of minutes after the end of Sawmill's eruption. But five minutes later, the surging and bubbling built into another nice Uncertain eruption.

Back out for the evening Grand. Saw Turban in eruption as I locked up my bike. Noted that Belgian had dropped a little, but was still mostly full, while West Triplet had just ended overflow. Was finishing setting up my camera when Grand suddenly started booping, catching me off guard. So I failed to get a video of another One Burst Grand eruption. The wind direction was toward the walkway, soaking the benches between the prediction sign and West Triplet.

2025-May-24 : 17:58:33 G1C

 17:58:33	B1	--- d=09m52s
 17:59:17	Turban	0m44s
 18:00:33	Vent Ovfl	2m00s
 18:02:02	Vent	3m29s
 18:08:25	P1	9m52s
Vent & Turban continue

				     	ΣD=09m52s

West Triplet was back in overflow, and Sawmill was erupting, as we left the area. Have not seen any activity in Bulger since the activity of Bulger's Hole.

After last night, it was welcome to wake up to clear skies and no wind, although there was heavy frost on all the vehicles in the cabin area. Once again, Sawmill started during the walk from Castle. Spasmodic was high, and starting to overflow. Belgian Pool was full clear to the rim.
West Triplet also showed evidence that it had overflowed a bit, but was now well below that.

The wait for Grand started out well enough, but just after the six hour mark of the interval we had a heavy fill, strong Turban eruption with Vent overflowing during that time. This meant we were going to have another long wait.

After the sixth Turban eruption later came the announcement of water in Beehive's Indicator followed by the start. Of course Grand erupted on with the next opportunity. This One Burst Eruption lasted less than ten minutes but Vent & Turban still quit afterwards.

2025-May-23 : 13:01:13 V7/T1Q

 13:00:25	Turban		-0m48s
 13:00:56	Vent Ovfl	-0m17s
 13:01:13	B1	--- d=09m35s
 13:03:44	Vent	2m31s
 13:10:48	P1	9m35s
 13:12:18	V&T Quit	11m05s

				     	ΣD=09m35s
	* * * * *
 10:17:00			d=05m39s 	
 10:35:29	Int: 18m29s	d=04m20s 	
 10:54:32	Int: 19m03s	d=03m42s  V0 Vent ovfl: 10:55:43	
 11:10:30	Int: 15m58s	d=03m28s  V1	
 11:29:44	Int: 19m14s	d=03m26s  V2	
 11:48:48	Int: 19m04s	d=04m14s  V3	
 12:08:31	Int: 19m43s	d=04m10s  V4	
 12:26:26	Int: 17m55s	d=03m39s  V5	
 12:43:10	Int: 16m44s	d=03m31s  V6	
		     Turban: 17m39s

Following that I checked on Economic, which was unchanged from the night before. It's hot and overflowing, but needs something more for there to be some activity. As I came back past Grand I noted that West Triplet was in a steady overflow.

The Sawmill eruption I saw start lasted well over four hours. An hour or so after it finally quit I went back out to see if Uncertain might erupt. It was also well inside the Castle eruption window. It wasn't long before Castle started, and the eruption lasted 2m52s. It slopped for a while, but after that was much quieter than many post-minor periods I've seen.

Uncertain didn't seem to do much until shortly after the Castle eruption when Sawmill suddenly had a 50s long eruption. It was still quiet for the better part of half an hour before it started to have periods of overflow. A couple more of these, and it started erupting. That eruption was followed about a minute later by the start of Sawmill.

As we were leaving I noticed that Oblong was putting up a lot of steam. A change of position confirmed that it was in eruption.

The next Grand eruption followed much of the pattern of the previous eruptions-- a long wait before the One Burst Grand. Waited exactly two hours as the Turban intervals and durations got shorter. After a Turban interval that was less than 16 minutes, we got a longer one, and during that extra time Grand finally started looking full with waves. The One Burst Eruption lasted almost 10-1/2 minutes, and despite being longer than the Grand eruption earlier in the day, Vent & Turban continued.

2025-May-23 : 20:53:20 T1C

 20:52:30	Turban		-0m50s
 20:52:47	Vent Ovfl	-0m33s
 20:53:13	Boop		-0m07s
 20:53:20	B1		--- d=10m28s
 20:55:42	Vent		2m22s
 21:03:48	P1		10m28s
Vent & Turban continue

				     	ΣD=10m28s
	* * * * *
 19:05:18			d=04m35s 	
 19:24:03	Int: 18m45s	d=04m13s 	
 19:43:44	Int: 19m41s	d=03m39s 	
 20:01:22	Int: 17m38s	d=04m03s 	
 20:18:53	Int: 17m31s	d=03m08s 	
 20:34:35	Int: 15m42s	d=03m25s 	
		     Turban: 17m55s

Sawmill was in eruption when I arrived, and was still erupting when I left. Belgian Pool had recovered and was just below full. West Triplet was overflowing after the Grand eruption.

Arrived at the Lodge just as Old Faithful erupted. We were checked in, unloaded and the cabin organized by the time of the next Old Faithful eruption. Right after that, went out to Grand. We knew that Rift had been seen in eruption, and it was still erupting as we arrived. But we also knew that there was a good chance that Bulger and Bulger's Hole would be active, too.

Sawmill started after we'd crossed the bridge, and then we saw Bulger was in eruption, too. It was a major and we hurried over there in time to see water in Bulger's Hole. The pool dropped, then came back and it erupted weakly for about half a minute. It was shortly after that that the Rift eruption ended.

About a half hour later, Bulger had another 5-1/2 minute long major eruption, and once again Bulger's Hole erupted with it. The duration was the same, but this time the eruption was strong, with a height of about three meters (above eye level while I was standing watching it.

During a brief interruption in our wait for Grand, Turban had a long Delay Interval lasting over 33 minutes. That was followed by seven more Turban eruption intervals before we finally got our first One Burst Grand of the year. At first I was going to illuminate the start, but there was still enough light, and a strong wind from the northwest so that the eruption was easily visible, with a distinctly bluish cast.

2025-May-22 : 21:40:46 D7/G1C

 21:40:46	B1	--- d=09m48s
 21:41:26	Turban	0m40s
 21:43:53	Vent	3m07s
 21:50:34	P1	9m48s
Vent & Turban continue

				     	ΣD=09m48s
	* * * * *
 18:40:11			d=04m37s 	
 18:58:48	Int: 18m37s	d=03m52s 	
 19:32:03	Int: 33m15s	d=05m06s  D0	
 19:49:58	Int: 17m55s	d=03m36s  D1	
 20:06:58	Int: 17m00s	d=03m26s  D2	
 20:25:59	Int: 19m01s	d=03m33s  D3	
 20:43:44	Int: 17m45s	d=03m17s  D4	
 21:02:08	Int: 18m24s	d=03m25s  D5	
 21:20:55	Int: 18m47s	d=03m30s  D6	
		      Grand: 19m51s

During that long wait, there were a couple more Bulger eruptions, at half hour intervals, but all Bulger's Hole really did was fill and splash maybe as high as the rim. During one Bulger eruption, there were two such fill episodes. The Bulger stopped erupting and all that was seen were a few splashes.

Also shortly before Grand Castle finally had a major eruption. It was rumbling nicely in the dark as we were untieing our bikes.

---

The "brief interruption" meantioned above was the appearance of a grizzly bear and her new cub on the boardwalk down by Beauty Pool. They continued down the boardwalk until they reached the northernmost Turban runoff channel. By that time, I'd shoved everything back into the pack, after getting out the bear-spray. The mother bear looked like she wanted to continue up the hill behind Grand, but then returned to the boardwalk when she wasn't followed. They passed right next to the benches where I always wait for Grand, then by the little boardwalk tree got back onto the ground headed southwest.

By that time I was over by Bulger, and able to take some video of the pair as suddenly the mother started running toward Churn and Scalloped. Now the bears that had been headed toward me were now headed away, so I stopped my retreat. The bears got back on the boardwalk by Scalloped, crossed the bridge, and went up the walkway between the railings. That was the last I saw of them. Someone on the radio reported them over by Castle.

Based on their behavior, the mother knew exactly where she wanted to go, where there was a way to cross the river without getting wet. A while later, I heard on the NPS radio that the two had been sighted in the trailer rows of the government area. Also learned that a similar pair had been sighted by Lynn Stephens in the Lower Basin near Labial around noon-time.

In all my waits at Grand, this was the first time I've felt the need to move due to animal behavior. A few times I've had bison herds suddenly appear and pass around me either going up the hill or coming down. I've also seen a bear, briefly, on the hillside.

Before sunrise I was over by Castle and started to feel droplets. Despite the weather forecast of clear, the clouds overhead were more than just keeping it dark. Didn't have a long wait for the Grand eruption, and once again it was a short two burst eruption that seems to have made no attempt at a third burst. At least Vent & Turban didn't quit.

2024-Sep-09:07:00:29 T2C

 06:59:58	Turban	-0m15s
 07:00:08	Boop	-0m05s
 07:00:13	B1	--- d=08m37s
 07:02:53	Vent	2m40s
 07:08:50	P1	8m37s d=22s
 07:09:12	B2	8m59s d=43s
 07:09:55	P2	9m39s
Vent & Turban continue

				     ΣB=09m20s	ΣD=09m42s
	* * * * *
 06:23:12			d=03m59s 	
 06:41:45	Int: 18m33s	d=04m11s 	
		     Turban: 18m13s

With time to kill, went over to Geyser Hill as it had been sixteen hours since the previous Beehive eruption. Didn't have a chance to start reading a book when the Indicator started. This was also a relatively short Indicator, with a duration under 20 minutes.

It was also windy up there, and I thought at times I could smell the breakfast odors coming from the Lower Store, as it would have been directly upwind. With is more interesting as during the Beehive eruption they had a fire alarm over there go off.

Later it was another short wait for another One Burst Grand Eruption. The wind had not improved and the smoke seemed stronger by then. After the eruption West Triplet came up to overflow. It had some heavy convection but no thumps or splashes.

2024-Sep-09:13:20:34 T1Q

 13:19:48	Turban	-0m46s
 13:20:10	Vent Ovfl	-0m24s
 13:20:27	Boop	-0m07s
 13:20:34	B1	--- d=10m35s
 13:23:11	Vent	2m37s
 13:31:09	P1	10m35s
 13:32:12	V&T Quit	11m38s

				     	ΣD=10m35s
	* * * * *
 13:00:43			d=04m24s 	
		     Turban: 19m05s

Mid-afternoon was the time to check out Fountain, based on its earlier activity. Arrived just in time to see the start, a 4-1/2 hour interval, along with a couple of Morning's Thief eruptions.

At sunset walked up to a Turban Delay Interval, but fortunately, we got the One Burst Eruption instead of a couple of hours of a delay. The eruption itself lasted 12-1/2 minutes, with Vent & Turban quitting within seconds of Grand's end.

2024-Sep-09:19:41:56 D0/G1Q

 19:41:56	B1	--- d=12m31s
 19:42:20	Turban	0m23s
 19:45:08	Vent	3m11s
 19:54:04	FP	12m07s
 19:54:27	P1	12m31s
 19:54:39	V&T Quit	12m42s

				     	ΣD=12m31s

Shortly after that, several of us sitting on the benches felt a sharp thump, much like the ones you get at Oblong or Artemisia. Have no idea what caused it, as there wasn't anyone near us on the boardwalk. As we left, we saw West Triplet overflow, but it didn't have any convection or thumping.

From there, went directly out to Fountain Group, on the off chance that we might get another Morning eruption. After about two hours of waiting, we got an eruption of Morning's Thief. That was followed within a minute or so of the start of Fountain.

For a double interval, the wait for the One Burst Grand eruption wasn't too long or cold. The eruption itself was nicely backlit but otherwise undistinguished.

2024-Sep-08:09:24:27 G1C

 09:24:23	Boop	-0m04s
 09:24:27	B1	--- d=10m08s
 09:24:52	Vent Ovfl	0m25s
 09:25:12	Turban	0m45s
 09:27:58	Vent	3m31s
 09:34:35	P1	10m08s
Vent & Turban continue

				     	ΣD=10m08s
	* * * * *
 08:05:01			d=04m05s 	
 08:26:22	Int: 21m21s	d=04m25s 	
 08:46:00	Int: 19m38s	d=04m00s 	
 09:04:15	Int: 18m15s	d=03m48s 	
		      Grand: 20m12s

Decided to ride the bike over to Biscuit Basin for some photos. There were a fair number of people pulling up to the close entrance road while I was there. None of them actually got out of their vehicles or even turned off the engine.

Sawmill was in eruption when I went out to see Grand, and was still in eruption over five hours later. With a deep drain in progress, I started taking some videos of the area. Got Oval Spring having constant low pool surging, some Spasmodic northwest vent activity, and a Penta steamphase minor. By that time Sawmill finally stopped, so it was time to transfer attention to Uncertain, which started looking good during the Penta activity. Fortunately, it took its time. During the wait, I managed to record a couple of low pool, no overflow eruptions of Sawmill, and finally got Uncertain erupting.

By the time Uncertain had finished, it was time to move over to Grand. We were over 7-1/2 hours into the interval when Beehive's Indicator was noticed by the NPS. So once again, the benches at Grand emptied. The Grand eruption started right after the end of Beehive's eruption, but it was a nice but short two burst eruption, so most who had went to Beehive made it back. The eruption lasted less than ten minutes, and there was no attempt at a third burst.

2024-Sep-08:17:31:25 T2C

 17:31:02	Turban	-0m23s
 17:31:05	Vent Ovfl	-0m20s
 17:31:19	Boop	-0m06s
 17:31:25	B1	--- d=08m02s
 17:33:25	Vent	2m00s
 17:39:27	P1	8m02s d=38s
 17:40:06	B2	8m41s d=55s
 17:41:01	P2	9m36s
Vent & Turban continue

				     ΣB=08m57s	ΣD=09m36s
	* * * * *
 15:40:28			d=01m37s 	
 15:56:55	Int: 16m27s	d=03m39s 	
 16:15:19	Int: 18m24s	d=04m05s 	
 16:33:52	Int: 18m33s	d=03m25s 	
 16:51:10	Int: 17m18s	d=03m58s 	
 17:09:42	Int: 18m32s	d=03m36s 	
		     Turban: 21m20s

When we arrived at the Fountain Paint Pots parking lot, there weren't any lights in the distance. We quickly got our gear together, and were about to leave when sudden there were lights and the sounds of people yelling. We hurried over and caught about two-thirds of the second Morning eruption of the year. It was nicely illuminated by several torches, and there was no wind, so Morning was not hidden behind Fountain and Clepsydra steam clouds. After Morning ended we stuck around for the Fountain eruption, which lasted about three quarters of an hour.

When we returned to the cabin, it was time for Grand. We had just arrived when Castle started to erupt. A few minutes later I heard some booping, and we got the One Burst Grand eruption. There was a slight breeze which helped move the steam away from our view. Unfortunately, it was another short eruption with no attempt at a second burst.

2024-Sep-08:23:48:03 G1C

23:47:55	Boop	-0m07s
23:48:03	B1	--- d=09m04s
23:57:07	P1	9m04s
Vent & Turban continue

				     	ΣD=09m04s

By this time Castle was in full steam phase, so we spent a little time watching it slowly die down.

The call for Beehive's Indicator went out around 23:00. With all the long durations, that meant plenty of time to get properly dressed and prepared for a calm, well lighted eruption. Little Squirt was also active at that time.

I missed it, but it turns out that at the same time, Rift was erupting. Not sure when it started, or for how long it erupted, but the next morning at dawn I found Grand an empty crater, and Turban had what appeared to be a normal eruption, so the previous interval wasn't excessively long.

Came back out about 2-1/2 hours later and Grand was well into overflow. Then proceeded to wait for nearly four hours for the mid-day One Burst Grand Eruption. As with many recent eruptions, this one started with a series of boops over a period of about ten seconds.

2024-Sep-07:13:15:38 T1Q

 13:15:25	Vent Ovfl	-0m13s
 13:15:29	Boop	-0m09s
 13:15:37	Turban	-0m01s
 13:15:38	B1	--- d=10m49s
 13:18:19	Vent	2m40s
 13:26:28	P1	10m49s
 13:27:16	V&T Quit	11m37s

				     	ΣD=10m49s
	* * * * *
 09:48:59			d=04m13s 	
 10:07:05	Int: 18m06s	d=04m14s 	
 10:26:14	Int: 19m09s	d=03m58s 	
 10:47:54	Int: 21m40s	d=04m11s 	
 11:08:00	Int: 20m06s	d=04m22s 	
 11:26:54	Int: 18m54s	d=03m48s 	
 11:45:19	Int: 18m25s	d=04m17s 	
 12:04:43	Int: 19m24s	d=04m02s 	
 12:22:37	Int: 17m54s	d=03m56s 	
 12:39:59	Int: 17m22s	d=03m55s 	
 12:58:22	Int: 18m23s	d=03m41s 	
		     Turban: 17m14s

After lunch, caught the mid-day Beehive eruption. For some reason, the boardwalk was nearly empty, despite (or because) an Old Faithful eruption being due. Old Faithful had a large preplay midway during the eruption of the Indicator, which ended up causing both geysers to start erupting within moments of each other.

The Sawmill eruption I saw start in the morning finally ended shortly after Grand, so after about 2-1/2 hours, I went out to wait for Uncertain. Sawmill was first rising, then started to drop. About this time Uncertain began to splash up, and we could see the water level in the vent. This level kept getting higher as Sawmill dropped. Finally Uncertain started to overflow. This lasted about 15 seconds, at which point the eruption finally began.

The next interval for the One Burst Grand eruption was surprisingly short. I expected it in the dark, but it was light enough to record video of the eruption, which once again started with a prolonged series of boops.

2024-Sep-07:19:37:29 G1Q

 19:37:19	Boop	-0m10s
 19:37:29	B1	--- d=10m20s
 19:38:02	Vent Ovfl	0m32s
 19:38:06	Turban	0m36s
 19:40:53	Vent	3m23s
 19:47:49	P1	10m20s
 19:48:50	V&T Quit	11m20s

				     	ΣD=10m20s
	* * * * *
 19:18:02			d=04m24s 	
		      Grand: 19m27s

As I was leaving Uncertain earlier in the day, I heard the radio call announcing that Morning Geyser had erupted. With Grand erupting sooner than expected, we decided that it made sense to at least head out there and see what might be happening. There was a small group of people who had heard of the eruption and were hanging around there. Waited for the crescent moon to set, about 45 minutes, during which time nothing happened. Water level was out of sight in Fountain.

As we were leaving, we saw a light approach from the Paint Pots. Suddenly the light veered off the boardwalk at the Volcanic Tablelands sign and headed north toward the trees. I had the powerful flashlight and lit the person up. He immediately and quickly headed back to the walkway, then continued toward us. For the next half hour, he wandered around the area as if wanted us to ignore him. In any case, he finally drove off.

It's true that we harassed him, but I would have ignored him completely if he had stayed on the walkway. As it was, I wonder if he had a campsite over behind that sign. Too bad for him Morning erupted.

Was quite surprised to learn that Grand erupted shortly before dawn. Had expected (and planned) on it erupting several hours earlier. The interval was so long that I suspected a Rift eruption, but when I got out there, it was obvious that Rift had not erupted overnight.

So instead I spent some time taking videos in the Sawmill Group. Got to see heavy bursting from Spasmodic as it dropped, Oval Spring having good size bursting from the north (front) vent, multiple eruptions of Tardy, the end of a Sawmill eruption, and a Penta steamphase minor.

Missed the start of the last item, as I was set up to record Bulger and Old Tardy (which ended up doing little to nothing), but quickly moved the camera over to Penta. Once that was over, it seemed like activity in Bulger did pickup a little.

Sawmill Group_2024-Sep-06_0910
---------------
2024-Sep-06
09:10:37   Start Observations                    Other Event
09:10:59ie >>>Eruption : d=35m44s                    Sawmill
09:11:08ie >>>Eruption : d=09s                         Tardy
09:11:17   End Eruption                                Tardy
09:11:35   Low, North vent active                Oval Spring
09:12:22ie >>>Eruption                                 Tardy
09:14:21   Dropping, active                        Spasmodic
09:17:02   >>>Eruption                                 Tardy
09:18:00   >>>Eruption                                 Tardy
09:18:17   >>>Eruption                                 Tardy
09:18:44   >>>Eruption : d=01m59s                      Tardy
09:20:09   End Eruption                                Tardy
09:25:41   >>>Eruption                                 Tardy
09:27:20   >>>Eruption : d=01m37s                      Tardy
09:28:57   End Eruption                                Tardy
09:32:06   Splashes                                    Tardy
09:32:32   Frequent splashes                           Tardy
09:33:18   >>>Eruption : d=32s                         Tardy
09:34:23   Splashes                                    Tardy
09:35:53   >>>Eruption : d=01m23s                      Tardy
09:37:16   End Eruption                                Tardy
09:40:06   Splashes                                    Tardy
09:41:31   Frequent splashes                           Tardy
09:41:53   >>>Eruption : d=01m48s                      Tardy
09:43:41   End Eruption                                Tardy
09:45:44   Splashes                                    Tardy
09:46:43   End eruption                              Sawmill
09:48:00   >>>Eruption                                 Tardy
09:59:18   Below lobe level                     Belgian Pool
10:00:14   Splashes                                   Bulger
10:12:24   >>>Eruption : d=16m02s,min                  Penta
10:19:09   Splashes                                   Bulger
10:28:26   End eruption                                Penta
10:29:32   >>>Eruption : min                       Old Tardy
10:30:39   Heavy steam                                 Penta
10:33:17   >>>Eruption                           Oval Spring
                    Low pool, north vent
10:45:10   Splashes                                   Bulger
10:45:49   >>>Eruption                                 Daisy
10:47:52   Splashes                                   Bulger
10:59:08   Splashes                                   Bulger
11:01:03   Splashes                                   Bulger
11:06:04   >>>Eruption                               Sawmill
11:07:25   Start ovfl                                Sawmill
11:17:02   End Observations                      Other Event

After Sawmill restarted, I took a break, and got back in time to begin waiting for Uncertain. At first Uncertain was making lots of gurgling sounds, with an occasional visible splash. Then, quite quickly, Uncertain became quiet. That turned out to be due to it rising in the vent. We witnessed a couple of floods coming from the vent before one of them triggered the Uncertain eruption.

After that, it was a bit early, but still time to wait for Grand. I wasn't paying close attention when I realized that Grand's pool was full and having small waves at the six hour mark. Got the camera started in time to capture a couple of the strong boops. As expected, the pool level quickly dropped well before Turban finally erupted.

Three Turban eruption intervals later, we got a repeat of that performance. This time there were at least five boops, with several well over a meter high. Turban finally erupted just after the 25 minute mark.

So once again we had to wait three more Turban eruption intervals. This time the pool filled early, around the fifteen minute mark, but did start having wavelets until several minutes later. Again, there was some booping from Grand, but this time we finally got the One Burst Eruption, which lasted well over eleven minutes, with Vent & Turban quitting within a minute, and restarting within another six minutes.

2024-Sep-06:14:32:02 B3/D3/G1Q

 14:31:53	Boop	-0m08s
 14:32:02	B1	--- d=11m19s
 14:32:22	Vent Ovfl	0m19s
 14:32:39	Turban	0m36s
 14:35:19	Vent	3m16s
 14:43:21	P1	11m19s
 14:44:16	V&T Quit	12m13s
 14:49:58	V&T Restart	17m56s

				     	ΣD=11m19s
	* * * * *
 12:34:57			d=05m45s  B0 Boop: 12:30:45	
 12:52:54	Int: 17m57s	d=04m28s  B1	
 13:13:24	Int: 20m30s	d=04m10s  B2	
 13:38:38	Int: 25m14s	d=04m35s  B3/D0 Boop: 13:35:05	
 13:55:40	Int: 17m02s	d=04m06s  B3/D1	
 14:12:55	Int: 17m15s	d=03m39s  B3/D2
		      Grand: 19m06s

The next Grand eruption would be in the dark. Unlike the last few intervals, however, the wait for this One Burst Grand was short, only 6-1/2 hours. The Turban eruption interval was not quite long enough to be a delay. Once again the eruption started with several boops. We heard the first one in the dark, 15 seconds before the eruption.

2024-Sep-06:20:59:27 G1C

 20:59:12	Boop	-0m15s
 20:59:27	B1	--- d=10m25s
 21:03:03	Vent	3m36s
 21:09:52	P1	10m25s
Vent & Turban continue

				     	ΣD=10m25s
	* * * * *
 20:35:21			d=04m42s 	
		      Grand: 24m06s

Did another half-hour video of Sawmill erupting, with Tardy frequently active. About a minute after I stopped recording, as I walked past Belgian Pool, Sawmill quit. Which was something I would've liked to have recorded.

Sawmill Group_2024-Sep-05_0738
---------------
2024-Sep-05
07:39:17ie >>>Eruption                               Sawmill
07:40:00   >>>Eruption : min                           Tardy
07:40:47   Medium level, active                    Spasmodic
07:41:33ns >>>Eruption : d=01m30s                      Tardy
07:43:03   End Eruption                                Tardy
07:43:32   Below lobe level                     Belgian Pool
07:53:11   >>>Eruption : d=02m39s                      Tardy
07:55:50   End Eruption                                Tardy
08:01:31   >>>Eruption : d=38s                         Tardy
08:02:09   End Eruption                                Tardy
08:02:49   >>>Eruption : d=29s                         Tardy
08:03:54   >>>Eruption : d=01m50s                      Tardy
08:05:44   End Eruption                                Tardy
08:09:26   Splashes                                    Tardy
08:10:27   Splashes                                    Tardy
08:10:52   >>>Eruption : d=05s                         Tardy
08:11:28   >>>Eruption : d=33s                         Tardy
08:13:40   >>>Eruption : d=16s                         Tardy
08:14:26   Splashes                                    Tardy
08:15:06   Splashes                                    Tardy
08:15:26   >>>Eruption : d=42s                         Tardy
08:17:14   Splashes                                    Tardy
08:18:15   Splashes                                    Tardy
08:18:43   >>>Eruption : d=07s                         Tardy
08:19:04   End Observations                      Other Event

The wait for the One Burst Grand Eruption was three hours of Turban intervals without any Turban Delay interval. Unlike so many one burst eruptions recently, this one lasted nearly eleven minutes.

2024-Sep-05:11:34:03 G1Q

 11:33:53	Vent Ovfl	-0m10s
 11:34:01	Boop	-0m01s
 11:34:03	B1	--- d=10m59s
 11:34:05	Turban	0m02s
 11:36:42	Vent	2m38s
 11:43:39	FP	9m36s
 11:45:03	P1	10m59s
 11:45:57	V&T Quit	11m53s
 11:51:32	V&T Restart	17m29s

				     	ΣD=10m59s
	* * * * *
 08:30:32			d=05m04s 	
 08:48:41	Int: 18m09s	d=04m16s 	
 09:08:47	Int: 20m06s	d=04m29s 
 09:27:27	Int: 18m39s	d=03m49s 
 09:46:23	Int: 18m55s	d=03m29s 
 10:03:23	Int: 17m00s	d=03m54s 
 10:22:18	Int: 18m55s	d=04m07s 
 10:41:10	Int: 18m51s	d=03m52s 
 10:58:53	Int: 17m43s	d=03m32s 
 11:16:03	Int: 17m09s	d=03m51s 
		      Grand: 18m00s

Did not participate in the long wait for Beehive to erupt, but did get out for the 25 minute long indicator. Once again, it was a mostly windless eruption, although there was an attempt at the breeze moving the spray toward the boardwalk.

In the evening, Grand was set up again for a sunset eruption, but unfortunately there was a real Turban Delay interval of nearly 33 minutes. The One Burst Grand didn't occur until six more intervals had passed, but it was still light enough to see details in the pool. There was a sharp false pause just short of the eight minute mark, and the whole eruption lasted just nine minutes. There was no attempt at a second burst, but at least Vent & Turban continued.

2024-Sep-05:20:12:56 D6/T1C

 20:12:27	Turban	-0m29s
 20:12:43	Vent Ovfl	-0m13s
 20:12:49	Boop	-0m07s
 20:12:56	B1	--- d=09m00s
 20:15:27	Vent	2m31s
 20:20:47	FP	7m51s
 20:21:56	P1	9m00s
Vent & Turban continue

				     	ΣD=09m00s
	* * * * *
 17:52:29			d=04m32s 	
 18:25:11	Int: 32m42s	d=04m32s  D0	
 18:42:18	Int: 17m07s	d=04m26s  D1	
 19:02:15	Int: 19m57s	d=03m30s  D2	
 19:18:23	Int: 16m08s	d=03m56s  D3	
 19:37:22	Int: 18m59s	d=03m49s  D4	
 19:55:57	Int: 18m35s	d=03m53s  D5	
		     Turban: 16m30s

It appears that overnight there was at least one long Grand eruption interval, since it was a double interval of sixteen hours. Otherwise the One Burst Grand was the common variety where it lasts less than 10-1/2 minutes. Vent & Turban seemed like they tried to quit, but then the activity picked up considerably, with Vent roaring as if something else could happen.

2024-Sep-04:11:03:11 T1C

 11:03:03	Vent Ovfl	-0m08s
 11:03:06	Boop	-0m05s
 11:03:10	Turban	-0m01s
 11:03:11	B1	--- d=10m17s
 11:06:03	Vent	2m52s
 11:13:28	P1	10m17s
Vent & Turban continue

				     	ΣD=10m17s
	* * * * *
 10:05:09			d=04m26s 	
 10:23:17	Int: 18m08s	d=04m02s 	
 10:43:31	Int: 20m14s	d=04m17s 	
		     Turban: 19m39s

Spent some time in the Sawmill Group recording videos and doing some field testing. Nothing much interesting happened.

Sawmill Group 3_2024-Sep-04_1159
---------------
2024-Sep-04
11:59:40   Quiet, near ovfl                          Sawmill
12:06:53ie >>>Eruption                                 Daisy
12:16:15   Peak, dropping                            Sawmill
12:16:49   Quiet, dropping                         Spasmodic
12:18:10   Splashes                                   Bulger
12:27:17   Water not visible                         Sawmill
12:37:52   >>>Eruption : d=41s,min                    Bulger
12:52:40   >>>Eruption : min                          Bulger
12:54:44   End Observations                      Other Event

In the evening there was another long series of Turban eruptions without there being a Turban Delay interval. During that time we saw a couple of Daisy eruptions and a nice tall and wide Oblong eruption. Two Turban intervals before the Grand eruption, we had what appeared to be an attempt at an eruption. That eruption was also short and weak. The next Turban interval after that was one where Grand had little to no overflow.

The Grand eruption started at about the last possible moment. It was two bursts, with the second burst starting with Grand's pool in the shadows. A faint rainbow was visible near the top of the water column, which shows how low the sun was. That burst also lasted almost 2-1/2 minutes, with much of that time taken up with Big Sawmill mode.

2024-Sep-04:19:16:01 T2*Q

 19:15:31	Vent Ovfl	-0m30s
 19:15:35	Turban	-0m26s
 19:15:54	Boop	-0m07s
 19:16:01	B1	--- d=08m12s
 19:18:31	Vent	2m29s
 19:24:14	P1	8m12s d=37s
 19:24:52	B2	8m50s d=02m24s
 19:27:17	P2	11m15s
 19:28:12	V&T Quit	12m10s

				     ΣB=10m37s	ΣD=11m15s
	* * * * *
 16:12:24			d=03m23s 	
 16:29:42	Int: 17m18s	d=04m11s 	
 16:49:41	Int: 19m59s	d=04m22s 	
 17:09:49	Int: 20m08s	d=04m06s 	
 17:28:50	Int: 19m01s	d=04m11s 	
 17:47:29	Int: 18m39s	d=03m57s 	
 18:06:59	Int: 19m30s	d=03m52s 	
 18:25:21	Int: 18m22s	d=04m09s 
 18:42:44	Int: 17m22s	d=03m16s 
 18:58:05	Int: 15m20s	d=02m58s 
		     Turban: 17m30s