geysers.org

Figured the double Grand eruption interval would put the eruption well into the morning, so didn't head out early. A report of Grand not overflowing with a Turban eruption helped narrow down the time, too.

After 45 minutes, we got a long Turban Delay interval, which fixed the prediction quite a bit. The One Burst Grand eruption was four Turban eruption intervals later. The duration was a disappointing 9-1/3 minutes, with Grand making no attempt at a second burst.

2024-Aug-31:10:41:48 D4/T1C

 10:41:11	Turban	-0m37s
 10:41:17	Vent Ovfl	-0m30s
 10:41:42	Boop	-0m05s
 10:41:48	B1	--- d=09m19s
 10:44:25	Vent	2m36s
 10:51:08	P1	9m19s
Vent & Turban continue

				     	ΣD=09m19s
	* * * * *
 08:50:43			d=04m17s 	
 09:27:37	Int: 36m54s	d=05m36s  D0	
 09:46:22	Int: 18m45s	d=04m38s  D1	
 10:05:37	Int: 19m15s	d=04m11s  D2	
 10:22:34	Int: 16m57s	d=03m35s  D3	
		     Turban: 18m37s

Afterwards it was pointed out that an Artemisia eruption hadn't been seen since yesterday. It being a nice warm day with only a slight breeze, I decided that here was the opportunity to make a video of an eruption. Only had to wait about 1-1/2 hours, and suddenly heard and felt some thumps. The wind was away for most of the eruption, so had an excellent view.

Then on the way back, just as I approached the Lodge, came the call that Beehive's Indicator was starting. So went on over for that eruption. The wind was still a bit variable, and I had to get out the umbrella even though I thought I was in the safe zone at the eruption start.

Finally got a late evening eruption of Grand. No Turban Delay intervals, and the interval was only about 7-1/2 hours. The One Burst Grand eruption lasted just over ten minutes, and once again, there was no attempt at a second burst.

2024-Aug-31:18:13:16 G1C

 18:13:16	B1	--- d=10m07s
 18:14:07	Turban	0m51s
 18:14:17	Vent Ovfl	1m01s
 18:16:40	Vent	3m24s
 18:23:23	P1	10m07s
Vent & Turban continue

				     	ΣD=10m07s
	* * * * *
 16:42:37			
 17:01:35	Int: 18m58s	d=04m00s 	
 17:19:16	Int: 17m41s	d=03m51s 	
 17:37:30	Int: 18m14s	d=03m35s 	
 17:53:47	Int: 16m17s	d=03m51s 	
		      Grand: 19m29s

While leaving, noticed that Spasmodic was just starting overflow. Uncertain wasn't making much noise, but Sawmill was high. A few minutes later Sawmill started. Penta, meanwhile, was showing water splashing in the Top and Bottom Vents. This activity continued for about 1/2 hour, during which time Spasmodic dropped below overflow. Penta was still splashing around as I left.

Coming back from dinner in the Bear Pit, I was riding my bike when I encountered an animal just after I entered the cabin area. At first I thought it was a small coyote, but when I shined a light on it, it turned out to be a large fox. I ran past me and disappeared between some of the cabins nearer the Lodge. Now, if only it would harvest a few of the squirrels that insist upon coming in the cabin when the door is open.

Got up at dawn expecting to confirm that Grand had erupted recently, and that was the case. Based on the empty vents and lack of activity, I put the eruption around 05:00. I also noticed that Castle was having a deep, rumbling steam phase, also indicating that there had been a major eruption much earlier. Sawmill was also in eruption, but Spasmodic had a wet runoff channel, and looked it was near overflow again, but I didn't stay to see if that would happen.

The wait for the midday Grand eruption was relatively short. Saw Turban in eruption, and the next eruption was about 33 minutes later, so definitely a Turban Delay interval. Shortly after, a bison wandered across Grand's runoff channels, headed toward Economic. The One Burst Grand eruption came four Turban eruption intervals later.

2024-Aug-30:12:39:31 D4/G1C

 12:39:29	Boop	-0m02s
 12:39:31	B1	--- d=10m08s
 12:40:22	Turban	0m51s
 12:41:22	Vent Ovfl	1m51s
 12:43:05	Vent	3m34s
 12:49:39	P1	10m08s
Vent & Turban continue

				     	ΣD=10m08s
	* * * * *
 11:24:56			d=05m20s  D0	
 11:43:29	Int: 18m33s	d=04m08s  D1	
 12:02:31	Int: 19m02s	d=04m02s  D2	
 12:21:03	Int: 18m32s	d=03m54s  D3	
		      Grand: 18m28s

Afterwards, noticed that Uncertain was having occasional splashes while Sawmill was low. The latter slowly rose over the next half hour, and the splashing in Uncertain decreased, until Sawmill finally did erupt.

Once again, arrived to a Turban Delay Interval. This time saw the preceeding eruption from the bike rack, and there was a small boop that resulted in and immediate drop in Grand's pool level. On the third Turban eruption there was strong overflow, and the subsequent Turban eruption had no overflow, but it lasted far too short to be a true Delay. Then on the fifth interval, Grand had another Turban Delay, just over the limit. The One Burst Grand eruption was just visible in the twilight. Toward the end of the eruption, there were several slowdowns that behaved like Grand was trying to pause.

2024-Aug-30:20:34:29 D5/D0/G1Q

 20:34:24	Boop	-0m05s
 20:34:29	B1	--- d=10m00s
 20:35:13	Turban	0m44s
 20:37:37	Vent	3m08s
 20:42:59	FP	8m30s
 20:44:00	FP	9m31s
 20:44:29	P1	10m00s
 20:46:08	V&T Quit	11m39s

				     	ΣD=10m00s
	* * * * *
 19:00:18			d=04m16s  D0 Boop: 18:56:13	
 19:16:22	Int: 16m04s	d=04m29s  D1	
 19:34:31	Int: 18m09s	d=03m56s  D2	
 19:53:45	Int: 19m14s	d=03m15s  D3	
 20:09:21	Int: 15m36s	d=03m50s  D4	
		      Grand: 25m08s

Another day of Grand erupting in the morning at about the same time I my alarm went off so I could head out to see an eruption. Then again, correlation isn't always causation.

And Beehive erupted a few hours later. Once again, it was calm until shortly before the eruption when the wind started shifting about. Had to use the umbrella.

Before the next Grand eruption Uncertain looked promising, with Sawmill low, but slowly rising. Then Sawmill had two bursts, as if an eruption was starting, neither of which got much higher than the crater rim. That seemed to kill any chance of Uncertain, and the acual stort of Sawmill a few minutes later meant it was time to head over to Grand.

Also had to use the umbrella at Grand. After another series of non-descript Turban eruptions and intervals, Grand had a One Burst Eruption in what seemed like calm conditions. So much so that the people down by West Triplet and Rift got wet. Then the wind started swirling around, and the benches at the main runoff channel got soaked too. Then back to the south.

2024-Aug-29:14:08:20 G1C

 14:08:16	Boop	-0m04s
 14:08:20	B1	--- d=09m41s
 14:08:23	Vent Ovfl	0m03s
 14:08:37	Turban	0m16s
 14:11:19	Vent	2m59s
 14:18:02	P1	9m41s
Vent & Turban continue

				     	ΣD=09m41s
	* * * * *
 12:18:16			
 12:37:05	Int: 18m49s	d=03m52s 	
 12:55:36	Int: 18m31s	d=03m49s 	
 13:15:00	Int: 19m24s	d=03m38s 	
 13:32:59	Int: 17m59s	d=03m34s 	
 13:50:23	Int: 17m24s	d=03m21s 
		      Grand: 17m56s

The next Grand wait started at sunset. For once the interval was not atrocious, and the conditions were much better than last night. The One Burst Grand eruption was well illuminated, and the rain fell in the usual location to the northwest.

2024-Aug-29:21:35:57 G1C

 21:35:57	B1	--- d=10m17s
 21:36:51	Turban	0m54s
 21:39:33	Vent	3m36s
 21:46:15	P1	10m17s
Vent & Turban continue

				     	ΣD=10m17s
	* * * * *
 20:00:26			d=04m01s 	
 20:19:28	Int: 19m02s	d=04m13s 	
 20:39:57	Int: 20m29s	d=03m48s 	
 20:57:50	Int: 17m53s	d=04m08s 	
 21:15:04	Int: 17m14s	d=03m40s 	
		      Grand: 20m53s

It was a windy, cool morning. The temperature was only 50F, but the wind made up for it. The wind also blew the water column from Beehive right at most of the railing.

Once again, just missed a Grand eruption at dawn. I was a bit surprised that there would be two short intervals following yesterday's long wait. The wait for the mid-day Grand eruption wasn't so bad, just under 7-1/2 hours.

That eruption started out fairly normal, but with a lot happening in a short period of time. From Vent Overflow to Boops to Turban Start to Grand Start took twelve seconds. That first burst lasted only 7m18s, which either meant we got to see the shorted Grand in years, or were going to get a second burst. That second burst lasted exactly 75 seconds, just enough to qualify for a "*" marker. The last 30 seconds consisted of Grand trying to stop, but instead boiling up in Big Sawmill Mode. With the total duration at that point under nine minutes, again not surprised when we got a third burst. There was no attempt at a fourth, and Vent & Turban shut off within half a minute.

While waiting for Grand, I noticed a small sput to the south/right of Sput D. At first I thought it was activity from Sputnik, but after getting closer, determined that it was Sput G, which I first noticed about this time last year.

2024-Aug-28:12:58:10 T3*Q

 12:57:58	Vent Ovfl	-0m11s
 12:58:03	Boop	-0m07s
 12:58:07	Turban	-0m02s
 12:58:10	B1	--- d=07m17s
 13:01:02	Vent	2m51s
 13:05:28	P1	7m17s d=23s
 13:05:51	B2	7m40s d=01m15s
 13:07:06	P2	8m56s d=37s
 13:07:44	B3	9m33s d=46s
 13:08:30	P3	10m20s
 13:09:08	V&T Quit	10m57s
 13:27:38	V&T Restart	29m27s

				     ΣB=09m19s	ΣD=10m20s
	* * * * *
 11:48:24			d=04m26s 	
 12:06:15	Int: 17m51s	d=03m59s 	
 12:24:18	Int: 18m03s	d=03m36s 	
 12:40:27	Int: 16m09s	d=03m17s 	
		     Turban: 17m40s

After Grand I noticed that West Triplet was full. About nine minutes after Vent & Turban quit it started to overflow. After about two minutes, with water pouring out, thumps started, and collapsing bubbles could be seen down in the vent. This lasted for about a minute and a half, with overflow stopping shortly after.

Woke up to find that Grand had erupted about a half hour earlier. Not too disappointed, as it was cold and foggy out even after sunrise. Then we got the morning Beehive Indicator call. Went out with the intention of getting a video. The fog pretty much lifted during the wait for Beehive.

Little Squirt was in eruption, so after Beehive's eruption I got a few minutes of it. During that time it slowed down and almost quit. Since it was calm and Geyser Hill was empty, I stayed on to get about a half hour of Anemone erupting. During that time Little Squirt finally did quit. As for Anemone, I got some short South eruptions, and a long one, as well as several North eruptions. It was interesting how North Anemone would wait until noisy people were nearby before finally erupting.

Back in the cabin, I heard over the NPS radio that the Great Fountain prediction was for 11:15, but it was in overflow. This was around 08:45. I guess that this person didn't understand that a prediction based on overflow superseded the one based on the previous eruption. In any case, made the immediate decision to head out and try to see Great Fountain. It was my first visit to the Lower Basin this trip.

We arrived and had maybe a five minute wait. The first series had several nice bursts, which I got on video, so it was a slightly better than Adequate Fountain. Then went over to Fountain Paint Pots on the off chance that Fountain might also erupt. After an hour, we gave up and returned. Fountain didn't erupt until several hours later.

About an hour after the morning Grand eruption, Rift was reported to be in eruption. Went out to Grand at about the 6-1/2 hour mark, and Rift was still in eruption. We just missed a Turban Delay Interval, and proceeded to wait several hours until Grand finally had its One Burst Eruption. Toward the end of that time, Turban was having eruption durations less than three minutes long, and intervals under 16 minutes long. It also had a pseudo-delay, where the Turban interval suddenly jumped by about six minutes, and was followed by a Turban interval with no overflow. During the wait we also saw a nice Oblong eruption, one much larger than the ones I've seen earlier this trip.

2024-Aug-27:16:40:36 T1C

 16:39:45	Turban	-0m51s
 16:39:59	Vent Ovfl	-0m37s
 16:40:29	Boop	-0m07s
 16:40:36	B1	--- d=10m29s
 16:43:05	Vent	2m29s
 16:51:05	P1	10m29s
Vent & Turban continue

				     	ΣD=10m29s
	* * * * *
 13:22:57			d=03m35s 	
 13:40:24	Int: 17m27s	d=03m19s 	
 13:58:35	Int: 18m11s	d=03m29s 	
 14:18:48	Int: 20m13s	d=03m49s 	
 14:37:27	Int: 18m39s	d=03m42s 	
 14:55:34	Int: 18m07s	d=03m06s 	
 15:11:44	Int: 16m10s	d=03m10s 	
 15:28:24	Int: 16m40s	d=02m54s 	
 15:44:19	Int: 15m55s	d=02m57s 	
 16:06:31	Int: 22m12s	d=03m30s 	
 16:23:23	Int: 16m52s	d=03m10s 	
		     Turban: 16m22s

It rained overnight, so not going out for the middle of the night Grand eruption was the proper decision. Woke up around the 14 hour mark, so a good time to see what was going on. It was still heavy overcast, and rain seemed likely. As it turned out, I got there in time for a Turban Delay interval. Rumor has it that the NPS recorded an eruption time of around 02:00, so that meant it was the early Delay interval.

For the third Turban interval later, there was again heavy overflow that looked like it was leading up to a Turban Delay. The expected rain never materialized, it was mostly clear and warming. Grand had an explosive start, nicely backlit by the sun. The total duration of the two burst eruption was just over ten minutes, and Vent & Turban quit suddenly, as if the eruption had been a lot longer. It was hard to tell, because the runoff was wet by the rains, but it appears West Triplet never came close to overflowing.

2024-Aug-26:08:37:32 D3/D0/G2Q

 08:37:32	B1	--- d=08m49s
 08:38:20	Turban	0m48s
 08:40:40	Vent	3m08s
 08:46:22	P1	8m49s d=39s
 08:47:02	B2	9m29s d=31s
 08:47:34	P2	10m01s
 08:48:20	V&T Quit	10m47s
 08:58:23	V&T Restart	20m50s

				     ΣB=09m21s	ΣD=10m01s
	* * * * *
 07:33:48			d=05m30s  D0	
 07:52:10	Int: 18m22s	d=04m21s  D1	
 08:11:13	Int: 19m03s	d=04m24s  D2	
		      Grand: 26m19s

Spent some time in the Sawmill Group field testing an update to my iPhone app. Not much happened during that time.

Sawmill Test_2024-Aug-26_1041
---------------
2024-Aug-26
10:41      In eruption                               Sawmill
10:47:55   >>>Eruption : d=03m49s                      Tardy
11:14:07   >>>Eruption : d=02m38s                      Tardy
11:16:45   End eruption                                Tardy
11:17:04   End eruption                              Sawmill
11:23:13   Splashing                                  Bulger
11:33:28   >>>Eruption : min                          Bulger
11:49:48   End Observations                      Other Event

Later it was again time for Grand. Castle erupted just before I left the cabin, and was going into a nice steam phase by the time I got out there. The wait for the One Burst Grand was short, as was the eruption itself.

2024-Aug-26:15:02:43 D0/T1C

 15:01:50	Turban	-0m53s
 15:02:43	B1	--- d=08m43s
 15:04:27	Vent Ovfl	1m44s
 15:05:22	Vent	2m39s
 15:11:26	P1	8m43s
Vent & Turban continue

				     	ΣD=08m43s
	* * * * *
 14:35:17			d=04m12s 	
		     Turban: 26m33s

After sunset it was cold and a bit windy. Arrived at Grand at the six hour mark with the expectation that the string of short intervals wouldn't last. The interval for the next One Burst Grand eruption was just over eight hours, and the duration was under ten minutes.

2024-Aug-26:23:03:15 G1C

 23:03:15	B1	--- d=09m44s
 23:12:59	P1	9m44s
Vent & Turban continue

				     	ΣD=09m44s
	* * * * *
 21:15:23			d=04m12s 	
 21:34:11	Int: 18m48s	d=03m21s 	
 21:50:25	Int: 16m14s	d=03m38s 	
 22:08:26	Int: 18m01s	d=04m01s 	
 22:28:04	Int: 19m38s	d=03m45s 	
 22:45:46	Int: 17m42s	d=03m36s 	
		      Grand: 17m29s

Grand was not observed during the night, and at twelve hours since the last known eruption, it was time to head back. Once again, I was passing Sawmill when the eruption started. When the first burst ended at less than eight minutes, I was assuming at least another burst. And there was just that one burst, with the total eruption duration just over nine minutes.

2024-Aug-25:08:29:32 2C

 08:29:27	B1	--- d=07m42s
 08:31:48	Vent	2m21s
 08:37:09	P1	7m42s d=35s
 08:37:44	B2	8m17s d=50s
 08:38:34	P2	9m07s
Vent & Turban continue

				     ΣB=08m32s	ΣD=09m07s

Beehive also did not erupt overnight, so went to Geyser Hill for a wait. At first it was cool and overcast, then the clouds disappeared and it became windy. When the Indicator did start, it was time to move to avoid the potential downpour. Based on the top of the Inn flags, it was going to be safe along the southern end of the railing, and it was. The eruption started with an explosive burst, then quit for a moment, only to rocket back up. The duration was a bit short, perhaps due to all that preliminary slopping around.

Went back out to Grand at the six hour mark, expecting this to be the longer interval. And it was, just under eight hours long. The Turban eruption prior to the Grand eruption was unusually short, just over 2-1/2 minutes. At the eight minute mark, Grand's pool looked full, and it slowly kept looking better until the eruption.

This time we had a first burst that lasted longer than the morning eruption, followed by a minute long pause and another minute long second burst. By the end of that burst, Vent was roaring away, but Grand's vent did have water in it for about 15 seconds. During the eruption West Triplet overflowed enough that the wet runoff channel extended all the way to the boardwalk and joined up with the Grand runoff.

2024-Aug-25:16:19:39 G2Q

 16:19:30	Boop	-0m08s
 16:19:39	B1	--- d=09m31s
 16:21:02	Turban	1m23s
 16:22:53	Vent	3m14s
 16:29:10	P1	9m31s d=01m04s
 16:30:14	B2	10m35s d=01m03s
 16:31:18	P2	11m39s
 16:32:12	V&T Quit	12m33s
 16:39:08	V&T Restart	19m29s

				     ΣB=10m35s	ΣD=11m39s
	* * * * *
 14:26:51			d=04m18s 	
 14:47:44	Int: 20m53s	d=04m17s	
 15:06:52	Int: 18m08s	d=04m04s
 15:25:43	Int: 18m51s	d=04m05s
 15:44:35	Int: 18m52s	d=03m42s
 16:01:44	Int: 16m09s	d=02m36s 	
		      Grand: 17m55s

As I was leaving, I saw that water in the vent of Uncertain was visible, gently rising and falling. It was drop out of sight for a while, then come back. Occasionally there was a blip, but it was mostly quiet. Finally after about twelve minutes, the water rose to overflow, and an eruption commenced.

Since the interval for Beehive was already over 14 hours, decided to spend an hour on Geyser Hill just in case it decided to erupt. Left after an hour.

After last night, decided that I needed to continue to try to be out for a Grand eruption at six hours into the interval. Didn't need to do that, as the One Burst Grand eruption came just under the nine hour mark for the interval.

2024-Aug-24:12:58:18 T1C

 12:57:43	Vent Ovfl	-0m35s
 12:57:47	Turban	-0m31s
 12:58:14	Boop	-0m04s
 12:58:18	B1	--- d=09m23s
 13:00:50	Vent	2m32s
 13:07:41	P1	9m23s
Vent & Turban continue

				     	ΣD=09m23s
	* * * * *
 10:07:18			d=04m01s 	
 10:28:49	Int: 21m31s	d=03m00s 	
 10:47:58	Int: 19m09s	d=03m16s 	
 11:07:42	Int: 19m44s	d=03m49s 	
 11:27:41	Int: 19m59s	d=03m16s 	
 11:46:30	Int: 18m49s	d=03m10s 	
 12:04:27	Int: 17m57s	d=02m27s 	
 12:23:07	Int: 18m40s	d=03m06s 	
 12:39:56	Int: 16m49s	d=02m55s 	
		     Turban: 17m51s

Had just left the cabin for the Snowlodge to do some laundry and hadn't left the cabin area when I heard the "five minute" call for Beehive's Indicator. I'd have heard the call for the start if I'd taken the radio with me to the indoor plumbing. With the Beehive interval already approaching 22 hours, I was thinking that it might be a short indicator, but instead it was well over 25 minutes long.

In the evening the weather was not particularly pleasant. It was gray and overcast with a strong wind. At one point everyone waiting dug out their raingear as there were some droplets and the sky looked like it could get much wetter, but the rain didn't ever come. Fortunately only had to wait an hour for the One Burst Grand eruption. The start was explosive, with the first jet of water about 10 meters high, with no preliminary warning. The eruption itself lasted under 8-1/2 minutes, one of the shortest eruptions of Grand I've seen. There was no attempt at Grand's vent even trying to refill.

2024-Aug-24:19:56:30 G1C

 19:56:30	B1	--- d=08m24s
 19:56:57	Turban	0m27s
 19:58:13	Vent Ovfl	1m42s
 19:59:40	Vent	3m09s
 20:04:55	P1	8m24s
Vent & Turban continue

				     	ΣD=08m24s
	* * * * *
 18:57:42			d=04m42s 	
 19:14:47	Int: 17m05s	d=04m13s 	
 19:33:14	Int: 18m27s	d=03m17s 	
		      Grand: 23m16s

Opened the cabin door to rain. Was expecting rain in the afternoon, but not at dawn. A check of the weather maps showed there would be a lull in which I could head out to Grand and not get wet until after I arrived, and would still get out early. As it was, I was looking over at Uncertain as I was walking by when I heard the start of the One Burst Grand eruption. Once I got past the steam from the southerly wind, I could see the activity clearly. During the eruption the sprinkling started up, so I spent a little time getting out the raincoat.

The eruption lasted 12-1/4 minutes, and I immediately left although it appeared that the threatened rain wasn't going to happen. I even considered staying around at Uncertain. Fortunately I didn't as it started pouring again just after I arrived at the cabin.

2024-Aug-23:06:50:54 1Q

 06:50:54	B1	--- d=12m15s
 06:54:17	Vent	3m22s
 07:03:09	P1	12m15s
 07:03:50	V&T Quit	12m55s

				     	ΣD=12m15s

The showers hadn't returned by the time I went out for the afternoon Grand eruption, but it was windy and cloudy, and it looked like there were showers off in the distance. For no apparent reason (unless there was a Turban Delay interval before I arrived), Grand just did not want to erupt. After several false starts, we finally got a rain shower that lasted about 15 minutes. That ended and suddenly it was clear and sunny. Then there was an attempt at a Turban Delay, but we got the One Burst Grand well before the cutoff point.

This time the single burst lasted about ten minutes, and Grand's vent did have water sloshing about for about 20 to 30 seconds before draining. At that point Turban and Vent became even more vigorous, then suddenly quit erupting.

2024-Aug-23:15:45:33 G1Q

 15:45:33	B1	--- d=09m54s
 15:46:27	Turban	0m54s
 15:48:14	Vent	2m40s
 15:55:28	P1	9m54s
 15:57:19	V&T Quit	11m45s
 16:04:38	V&T Restart	19m04s

				     	ΣD=09m54s
	* * * * *
 12:55:56			d=04m17s 	
 13:16:57	Int: 21m01s	d=04m29s 	
 13:35:35	Int: 18m38s	d=03m59s 	
 13:54:39	Int: 19m04s	d=03m03s 	
 14:11:35	Int: 16m56s	d=03m33s 	
 14:29:08	Int: 17m33s	d=02m59s 	
 14:45:39	Int: 16m31s	d=03m07s 	
 15:03:40	Int: 18m01s	d=03m12s 	
 15:22:10	Int: 18m30s	d=03m25s 	
		      Grand: 23m23s

Heard the One Burst Grand eruption in the dark as I was riding my bike up toward Castle. Too loud to be Sawmill. Moon was just a bright spot below the eastern horizon. Based on the end time, that interval was about 6h18m. So much for being able to start the wait a bit later. (Another four Grand eruptions day, too.)

It was just starting to get light at 06:00 as I tied my bike up over by Castle. Across the way there was a steaming area that looked suspiciously like Rift erupting. And it was.

The Rift eruption continued for almost another 1-1/2 hours, finally ending at 07:23. There was no evidence of even runoff from West Triplet, no pools of wet in the runoff channel. During that time I saw a number of Bulger minor eruptions. Also spent time at Sawmill as Uncertain was strongly gurgling. Once it appeared as if it was starting to erupt, but then Sawmill's pool starting to boil and erupt.

If the Turban interval before the Grand eruption had lasted another 30 seconds, it would've been a Turban Delay interval. The eruption was nicely backlit, but extremely steamy. Fortunately, the rain on the north side was light so it was possible to see Turban and Vent start.

When the first burst ended at 10m18s, I figured the eruption was over and started head over to turn off my camera, when I was surprised by a second burst. The pause was extremely short, and steamy, but well above the steam over Grand .

2024-Aug-22:07:51:19 G2Q

 07:51:19	B1	--- d=10m18s
 07:51:24	Turban	0m05s
 07:53:45	Vent	2m26s
 08:01:37	P1	10m18s d=21s
 08:01:58	B2	10m39s d=26s
 08:02:25	P2	11m06s
 08:03:11	V&T Quit	11m51s

				     ΣB=10m45s	ΣD=11m06s
	* * * * *
 06:13:40			d=03m50s 	
 06:32:10	Int: 18m30s	d=03m12s 	
 06:50:11	Int: 18m01s	d=03m16s 	
 07:08:59	Int: 18m48s	d=03m24s 
 07:27:04	Int: 18m04s	d=03m25s 	
		      Grand: 24m14s

As I left, the Bulger minor eruptions continued, and Belgian Pool was full to the rim. Crystal Spring had overflowed enough that the water in the runoff had reached the boardwalk.

Went out in the afternoon with the expectation that it might be a long wait. Not surprised to see Crystal Spring and Belgian Pool way down, about 15cm with the shelf in Crystal partly exposed.

Also not surprised when the second Turban eruption I saw came after a 32 minute interval, and include a couple of Grand boops. It took seven more Turban eruption intervals before Grand finally had the One Burst Erutpion. During the wait I saw some splashing from Sput A, and Sput D (Delta) erupted for the first time shortly before Grand.

2024-Aug-22:16:25:32 D7/G1C

 16:25:28	Vent Ovfl	-0m03s
 16:25:32	B1	--- d=10m59s
 16:25:40	Turban	0m07s
 16:28:30	Vent	2m58s
 16:36:31	P1	10m59s
Vent & Turban continue

				     	ΣD=10m59s
	* * * * *
 13:51:48			d=03m50s 	
 14:23:58	Int: 32m10s	d=03m53s  D0 Boop: 14:20:57	
 14:39:22	Int: 15m24s	d=03m47s  D1	
 14:56:56	Int: 17m34s	d=03m09s  D2	
 15:15:13	Int: 18m17s	d=02m57s  D3	
 15:32:26	Int: 17m13s	d=03m37s  D4
 15:50:37	Int: 18m11s	d=03m22s  D5
 16:08:39	Int: 18m01s	d=03m25s  D6	
		      Grand: 16m52s

When I left, Crystal and Belgian were even lower than what I saw earlier, maybe down 20cm. Oval was low, and the north vent was occasionally jetting water onto the outer rim.

The clouds were clearing as the moon was rising. During the wait for the next Grand, saw a couple of Daisy eruptions and what appeared to be a weak Oblong eruption. At least I didn't hear any activity, and the steam cloud wasn't all that big. The Grand eruption had two bursts, and since it lasted less than ten minutes, it could have had a third.

2024-Aug-23:00:19:45 T2C

 00:19:24	Turban	-0m21s
 00:19:45	B1	--- d=08m16s
 00:22:15	Vent	2m30s
 00:28:01	P1	8m16s d=31s
 00:28:32	B2	8m47s d=58s
 00:29:31	P2	9m46s
Vent & Turban continue

				     ΣB=09m15s	ΣD=09m46s
	* * * * *
 22:30:12			d=04m03s 	
 22:49:11	Int: 18m59s	d=04m09s 	
 23:06:57	Int: 17m46s	d=04m18s 	
 23:26:31	Int: 19m34s	d=04m01s 	
 23:44:50	Int: 18m19s	d=03m45s 	
 00:02:59	Int: 18m09s	d=03m44s 	
		     Turban: 16m25s

The radio call for Beehive's Indicator came through just before the alarm for getting up to go out to Grand went off. So went over first to Beehive, then got out to Grand about an hour after my original plan. I didn't miss much, it appears. After about 1-1/2 hour wait, got a One Burst Eruption when it had warmed up a bit so it wasn't quite so steamy.

2024-Aug-21:09:12:37 G1C

 09:12:37	B1	--- d=09m54s
 09:12:58	Turban	0m21s
 09:15:36	Vent	2m59s
 09:22:31	P1	9m54s
Vent & Turban continue

				     	ΣD=09m54s
	* * * * *
 07:44:12			d=03m53s 	
 08:02:39	Int: 18m27s	d=03m45s 	
 08:20:47	Int: 18m08s	d=03m56s 	
 08:38:41	Int: 17m54s	d=03m23s 	
 08:55:43	Int: 17m02s	d=03m41s 	
		      Grand: 16m54s

Spent a couple of hours at Fan & Mortar. At times the High Vent could look interesting, strong and tall, but on the whole, I didn't see much in the way of any cycles. The vents would come on for a few minutes, then everything was quiet. The only good news was that Angle would shutdown along with the others.

After that, headed over to Daisy where a 102 minute interval resulted in a 3m25s long eruption.

The wait for Grand during the afternoon was similar to that of the morning. There was just a string of undistinguished Turban eruptions before the One Burst Grand eruption. The only notable difference was that the Turban eruption intervals were longer.

2024-Aug-21:17:20:46 T1Q

 17:20:07	Turban	-0m39s
 17:20:10	Vent Ovfl	-0m36s
 17:20:40	Boop	-0m06s
 17:20:46	B1	--- d=10m15s
 17:23:05	Vent	2m18s
 17:31:02	P1	10m15s
 17:31:56	V&T Quit	11m10s

				     	ΣD=10m15s
	* * * * *
 15:19:38			d=04m19s 	
 15:39:12	Int: 19m34s	d=04m02s 	
 16:00:59	Int: 21m47s	d=04m15s 	
 16:21:40	Int: 20m41s	d=04m04s 	
 16:40:09	Int: 18m29s	d=03m11s 
 16:58:38	Int: 18m29s	d=03m37s 
		     Turban: 21m28s

Arrived for the moonlight Grand and waited a total of five minutes for a nice two burst eruption. There was a slight breeze blowing the steam to the north, so couldn't see Turban or Vent start, but it also made the activity easily visible, especially the second burst. And that concluded a four Grand eruption day.

2024-Aug-21:23:45:21 G2C

 23:45:21	B1	--- d=09m03s
 23:54:25	P1	9m03s d=43s
 23:55:08	B2	9m46s d=44s
 23:55:52	P2	10m31s
Vent & Turban continue

				     ΣB=09m47s	ΣD=10m31s

There wasn't a Turban Delay interval, but Grand still took nearly 2-1/2 hours after my arrival before sunrise to finally have the One Burst Eruption. For six Turban intervals, both the durations and the intervals got short so that the Grand eruption was less than 16 minutes after a Turban eruption lasting less than 3-1/2 minutes. Were fortunate to have Grand erupt when it did, as a thunderstorm moved in as we were leaving, with a downpour about twenty minutes later.

2024-Aug-20:08:40:19 T1C

 08:40:02	Turban	-0m16s
 08:40:19	B1	--- d=10m53s
 08:43:09	Vent	2m50s
 08:51:12	P1	10m53s
Vent & Turban continue

				     	ΣD=10m53s
	* * * * *
 06:22:31			d=01m39s 	
 06:35:46	Int: 13m15s	d=04m39s 	
 06:53:52	Int: 18m06s	d=04m07s 	
 07:11:57	Int: 18m05s	d=03m59s 	
 07:30:57	Int: 19m00s	d=03m38s 	
 07:49:18	Int: 18m21s	d=03m33s 	
 08:07:07	Int: 17m49s	d=03m29s 	
 08:24:23	Int: 17m16s	d=03m27s 	
		     Turban: 15m38s

Ended up waiting less than two Turban eruption intervals before the next Grand eruption. The interval on which Grand eruption was almost a Turban Delay interval, but came about 25seconds short. It took Turban almost a minute to start its eruption. The first burst lasted 9m18s, and the pause between the bursts was short, at 21s. It also had a sort of two meter high boop before starting. It was a windy day, and my camera tripod tried to take flight on a couple of occasions.

2024-Aug-20:15:24:52 G2Q

 15:24:45	Boop	-0m07s
 15:24:52	B1	--- d=09m18s
 15:25:48	Turban	0m56s
 15:27:41	Vent Ovfl	2m49s
 15:28:36	Vent	3m44s
 15:34:10	P1	9m18s d=21s
 15:34:31	B2	9m39s d=44s
 15:35:15	P2	10m23s
 15:36:01	V&T Quit	11m09s

				     ΣB=10m02s	ΣD=10m23s
	* * * * *
 15:00:17			d=04m03s 	
		      Grand: 24m35s

Decided to kill some time at Riverside, but after about 15 minutes, got a radio call about Beehive's Indicator in eruption. As it had been less than twelve hours since the pre-sunrise eruption, decided to abandon Riverside and head to the Firehole River overlook. The Indicator lasted at least 27 minutes, and looked like we might be getting a False Indicator. Until the last five minutes or so, there was only some weak splashing from Beehive.

Grand could've taken the opportunity to erupt instead of having a Turban Delay interval. The moon had just risen above the trees, and it would have been nicely backlit. Instead it was six Turban intervals later, and after midnight, when Grand behaved like it was going to erupt. It wasn't a Turban Delay interval, as the interval was less than 22 minutes. For the next Turban eruption there was no overflow, as if it had been a Delay interval.

Grand finally had the One Burst Eruption on the eighth interval, lasting under 9-1/2 minutes. Uncertain was gurgling steadily as we left, but after being out that long, decided it didn't need me around in order to erupt.

2024-Aug-21:00:40:08 D8/G1C

 00:40:08	B1	--- d=09m23s
 00:49:32	P1	9m23s
Vent & Turban continue

				     	ΣD=09m23s
	* * * * *
 21:33:35			d=04m47s 	
 21:50:56	Int: 17m21s	d=04m16s 	
 22:16:33	Int: 25m37s	d=04m21s  D0	
 22:32:58	Int: 16m25s	d=04m24s  D1	
 22:51:56	Int: 18m58s	d=03m57s  D2	
 23:10:37	Int: 18m41s	d=03m50s  D3	
 23:28:12	Int: 17m35s	d=03m24s  D4	
 23:44:23	Int: 16m11s	d=03m35s  D5	
 00:06:09	Int: 21m46s	d=04m21s  D6	
 00:24:19	Int: 18m10s	d=03m39s  D7
		      Grand: 15m49s

With it pouring rain at midnight, didn't bother to head out, although it appears the conditions improved enough that the overnight Grand eruptions was seen on the webcam

So got out well after sunrise for the morning Grand eruption. No sign of a delay, so the interval to the One Burst Grand eruption was only about seven hours.

2024-Aug-19:09:19:49 G1C

 09:19:49	B1	--- d=08m46s
 09:20:40	Turban	0m50s
 09:23:04	Vent	3m14s
 09:28:36	P1	8m46s
Vent & Turban continue

				     	ΣD=08m46s
	* * * * *
 08:15:42			d=04m19s 
 08:35:50	Int: 20m07s	d=04m11s 
 08:55:17	Int: 19m26s	d=04m41s 	
		      Grand: 24m32s

Decided that this might be a good day to try for a Beehive video. Turned out to be correct, as there was almost no one waiting for the eruption. All the little sputs around the cone were quiet. After about an hour of waiting, I thought that I was hearing some bubbling or a frying pan, but could see the source of the noise. About five minutes later the Indicator started erupting. The video turned out nicely, although my framing was a bit off with the Indicator.

In the afternoon walked up onto a Turban Delay interval. Unlike previous days, only had to wait for two Turban eruption intervals before the One Burst Grand eruption.

2024-Aug-19:16:19:15 D2/G1Q

 16:19:07	Boop	-0m07s
 16:19:15	B1	--- d=10m56s
 16:20:10	Turban	0m54s
 16:23:37	Vent	4m22s
 16:30:12	P1	10m56s
 16:31:28	V&T Quit	12m13s

				     	ΣD=10m56s
	* * * * *
 15:39:37			d=05m27s  D0	
 15:58:27	Int: 18m50s	d=04m10s  D1	
		      Grand: 20m48s

Went out for the sunset Castle eruption. Starting about 2-1/2 minutes into the eruption, Castle began to have significant pauses every 40-45 seconds or so. This continued until the ten minute mark, when a restart did not occur. For the next 2-1/2 minutes Castle was mostly quiet, with only occasional weak splashes. Then one of those splashes built up and the eruption resumed. It seemed like the transition to steam was delayed also.

Finally went out for the moonlit midnight Grand. There wasn't any Turban Delay, and the 7-1/2 hour interval put the One Burst Grand eruption start just before midnight.

2024-Aug-19:23:51:43 T1C

23:50:31	Turban	-1m12s
23:51:43	B1	--- d=09m42s
00:01:26	P1	9m42s
Vent & Turban continue

				     	ΣD=09m42s
	* * * * *
22:38:00			d=04m24s 
22:57:16	Int: 19m16s	d=04m09s 
23:15:55	Int: 18m38s	d=03m34s 
23:32:36	Int: 16m41s	d=03m54s 
		     Turban: 17m54s

Got a wakeup call for Beehive at 04:20 that the Indicator was in eruption. Just made it over in time for the start of Beehive's eruption.

I had planned on going out to Grand about an hour later, so instead of trying to get a little sleep, went on out in the dark. I'm pretty sure I arrived in the middle of a Turban Delay interval, based on the long, heavy overflow and that the next Turban eruption interval had no overflow audible from Grand. So it was a cold wait through six Turban intervals before the One Burst Grand eruption.

2024-Aug-18:07:25:09 G1Q

 07:25:09	B1	--- d=11m17s
 07:26:00	Turban	0m51s
 07:28:25	Vent	3m16s
 07:36:26	P1	11m17s
 07:37:21	V&T Quit	12m12s

				     	ΣD=11m17s
	* * * * *
 05:34:49			d=05m38s 	
 05:53:15	Int: 18m26s	d=03m49s 	
 06:11:26	Int: 18m11s	d=04m10s 	
 06:30:48	Int: 19m22s	d=03m43s 	
 06:48:35	Int: 17m47s	d=03m23s 	
 07:05:51	Int: 17m16s	d=03m56s 	
		      Grand: 19m18s

The afternoon gave us a Turban Delay interval followed by a seven Turban interval delay before the One Burst Grand eruption.

2024-Aug-18:16:24:00 D7/T1C

 16:23:21	Vent Ovfl	-0m39s
 16:23:24	Turban	-0m36s
 16:23:55	Boop	-0m05s
 16:24:00	B1	--- d=09m22s
 16:26:36	Vent	2m36s
 16:33:22	P1	9m22s
Vent & Turban continue

				     	ΣD=09m22s
	* * * * *
 13:51:19			d=04m20s 	
 14:16:23	Int: 25m04s	d=03m38s  D0	
 14:31:50	Int: 15m27s	d=04m18s  D1	
 14:50:36	Int: 18m46s	d=04m17s  D2	
 15:09:39	Int: 19m03s	d=03m42s  D3	
 15:27:16	Int: 17m37s	d=04m04s  D4	
 15:45:32	Int: 18m16s	d=03m21s  D5	
 16:02:20	Int: 16m48s	d=03m45s  D6	
		     Turban: 21m04s

With no report on activity in the Grand or Sawmill groups, and Grand's interval around nine hours, I went out at sunrise to see what was going on. I found that Rift's marker was gone, and all of the features there quiet. But I only had to wait one Turban eruption interval before Grand erupted. Unlike yesterday, at least the One Burst Eruption lasted about 10-1/2 minutes.

2024-Aug-17:07:18:12 T1Q

 07:17:57	Turban	-0m15s
 07:18:12	B1	--- d=10m29s
 07:20:45	Vent	2m33s
 07:28:41	P1	10m29s
 07:29:33	V&T Quit	11m21s
 07:37:29	V&T Restart	19m17s

				     	ΣD=10m29s
	* * * * *
 07:01:30			d=02m59s 	
		     Turban: 16m27s

Afterwards, I noticed that the water levels in the Sawmill Group were high. Belgian Pool was full to the rim, while Crystal was overflowing slightly and drowning Slurp. Sawmill was high and quiet, while Spasmodic was quiet and starting to overflow. Tardy was full and overflowing, and booped once while I was taking a video of the group.

The overflow from Spasmodic ended within ten minutes, and all the water levels dropped by then.

By early afternoon Belgian had dropped about 5cm so that the side lobe was empty. At Grand there were several undistinguished Turban eruptions followed by a Turban Delay interval of over 33 minutes. The next few intervals were all around 17 to 17-1/2 minutes long.

It was six Turban eruption intervals later where Grand finally looked like there would be an attempt at erupting. Vent started to overflow a few second before Turban began a vigorous eruption. This eruption lasted for over 2-1/2 minutes before Grand finally started, with Vent in overflow and Grand was pulsating the whole time. Because of the long delay in Grand starting, Vent started just over a minute after Grand.

The first burst lasted just under eight minutes. There was never much doubt that there would be a second burst, which ended up lasting a minute. Vent & Turban quit less that a minute later. Vent & Turban quickly restarted about nine minutes later.

2024-Aug-17:16:07:54 D6/T2Q

 16:05:13	Vent Ovfl	-2m41s
 16:05:17	Turban	-2m37s
 16:07:52	Boop	-0m02s
 16:07:54	B1	--- d=07m51s
 16:09:00	Vent	1m06s
 16:15:45	P1	7m51s d=42s
 16:16:27	B2	8m33s d=01m00s
 16:17:27	P2	9m33s
 16:18:16	V&T Quit	10m22s
 16:27:27	V&T Restart	19m33s

				     ΣB=08m51s	ΣD=09m33s
	* * * * *
 13:14:42			d=05m04s 	
 13:32:25	Int: 17m43s	d=04m19s 	
 13:50:38	Int: 18m13s	d=04m22s 	
 14:23:55	Int: 33m17s	d=04m16s  D0	
 14:39:54	Int: 15m59s	d=03m46s  D1	
 14:57:20	Int: 17m26s	d=03m53s  D2	
 15:14:32	Int: 17m12s	d=04m07s  D3	
 15:31:32	Int: 17m00s	d=03m50s  D4	
 15:48:47	Int: 17m15s	d=03m34s  D5	
		     Turban: 16m30s

For the third day in a row, Uncertain was looking interesting after Grand. Didn't have a long wait before we got to see it erupt.

The moon was high in the sky, and an orange-red due to a layer of smoke. It slowly improved during the wait for the next Grand eruption, but even an hour later there was a yellowish cast and it didn't seem bright enough for moonbows.

Arrived at Grand in time for the Turban Delay eruption, but fortunately, the wait was only for two more Turban intervals. Grand tried to have a second delay, but finally started the One Burst Eruption 24 minutes after the previous Turban eruption. As expected, we didn't see any sign of moonbows, although the moon was bright enough to see details of Grand's water spikes.

2024-Aug-17:23:09:56 G1C

 23:09:56	B1	--- d=10m09s
 23:10:48	Turban	0m52s
 23:13:21	Vent	3m24s
 23:20:06	P1	10m09s
Vent & Turban continue

				     	ΣD=10m09s
	* * * * *
 22:27:26			
 22:27:26	d=05m29s 	
 22:45:57	Int: 18m31s	d=04m34s 
		      Grand: 23m59s

During the Grand eruption, West Triplet was near overflow, and at one point, put out a trickle of water

Another foggy morning where I wasn't able to tell that Grand had not yet erupted until I got over by Rift. Only had to wait one Turban eruption interval before the One Burst Eruption started. It lasted under nine minutes.

2024-Aug-16:06:45:13 T1C

 06:44:58	Turban	-0m15s
 06:45:13	B1	--- d=08m52s
 06:48:02	Vent	2m48s
 06:54:06	P1	8m52s
Vent & Turban continue

				     	ΣD=08m52s
	* * * * *
 06:27:14			d=03m50s 	
		     Turban: 17m44s

In the afternoon, went out for the Grand eruption wait, and arrived in what was probably a Turban delay interval, based on having twenty minutes between my arrival and when Turban finally erupted. Grand erupted after a four Turban interval delay, and the One Burst Eruption only lasted 8m37s.

2024-Aug-16:14:07:34 G1C

 14:07:34	B1	--- d=08m38s
 14:08:29	Turban	0m55s
 14:08:58	Vent Ovfl	1m24s
 14:11:03	Vent	3m29s
 14:16:12	P1	8m38s
Vent & Turban continue

				     	ΣD=08m38s
	* * * * *
 12:52:18			d=05m35s 	
 13:10:28	Int: 18m10s	d=04m00s 	
 13:29:54	Int: 19m26s	d=03m48s 	
 13:47:45	Int: 17m51s	d=03m41s 	
		      Grand: 19m49s

Shortly after the end, did get to see another eruption of Uncertain, while a couple of hours later heard the radio call for Beehive. It was a bit windy, and of course the wind shifted just enough to insure the entire walkway railing got wet during the eruption.

Went out to Grand at sunset with the hope that it would take its time and not erupt until dark and by moonlight. Which it did. Unfortunately, during the Turban eruption interval preceeding the Grand eruption, clouds moved in and covered the moon. The clouds did part around the eight minute mark, so we did get some of the eruption by moonlight.

The first burst lasted exactly ten minutes, so it was a bit of a surprise when after a 48s pause, we got a second burst.

2024-Aug-16:21:34:45 2Q

 21:34:45	B1	--- d=10m00s
 21:44:45	P1	10m00s d=48s
 21:45:33	B2	10m48s d=40s
 21:46:13	P2	11m28s
 21:47:03	V&T Quit	12m18s

				     ΣB=10m40s	ΣD=11m28s
	* * * * *
 20:02:00			d=03m51s 	
 20:21:20	Int: 19m20s	d=04m17s 	
 20:40:18	Int: 18m58s	d=03m46s 	
 20:58:57	Int: 18m39s	d=04m18s 	
 21:17:01	Int: 18m04s	d=03m43s 	
		     Turban: 17m44s

On the walk back toward Castle, raindrops started to fall from a distant cloud, as the moon was still visible.