geysers.org

With all the longer intervals recently, decided it was time to push back my Grand window, especially for nighttime activity. Went out at around the seven hour mark, just as the moon in a clear sky was rising above the ridge.

Still ended up waiting almost an hour for the One Burst Grand Eruption. There was a several second long False Pause at around the 8-1/2 minute mark, then the first burst continued for almost three more minutes.

2025-Jun-14 : 01:33:26 T1Q

 01:33:13	Turban	-0m13s
 01:33:26	B1	--- d=11m15s
 01:41:52	FP	8m26s
 01:44:41	P1	11m15s
 01:45:40	V&T Quit	12m14s

				     	ΣD=11m15s
	* * * * *
 00:40:13			d=03m53s 	
 00:58:26	Int: 18m13s	d=03m29s 	
 01:14:47	Int: 16m21s	d=03m12s 	
		     Turban: 18m26s

It appeared that Rift erupted overnight, probably before midnight. Unlike yesterday, West Triplet did not eruption during the several hour wait at Grand, and never appeared to show wter in the vent.

Grand itself had a Turban Delay interval at our arrival. We finally got a One Burst Eruption two hours and six Turban eruptions later. The eruption was nicely backlit with what little wind pushing the steam to the north.

2025-Jun-13 : 09:26:11 D6/T1C

 09:25:31	Turban	-0m40s
 09:25:39	Vent Ovfl	-0m32s
 09:26:06	Boop	-0m05s
 09:26:11	B1	--- d=10m06s
 09:28:45	Vent	2m34s
 09:36:17	P1	10m06s
Vent & Turban continue

				     	ΣD=10m06s
	* * * * *
 07:32:35			d=05m10s  D0	
 07:50:58	Int: 18m23s	d=04m28s  D1	
 08:12:15	Int: 21m17s	d=03m54s  D2	
 08:33:57	Int: 21m42s	d=03m50s  D3	
 08:51:58	Int: 18m01s	d=03m23s  D4	
 09:08:20	Int: 16m22s	d=03m35s  D5	
		     Turban: 17m11s

Afterwards went to investigate the progress on the boardwalk between Oblong and Giant. For a week, it seemed like nothing much, about 50 feet of new walkway. At least it looked like the new walkway is solidly built and won't immediately get bouncy like the old walkway.

The dumpster in front of Grotto was gone, replaced by one that gouged the paving material. Will be interested to see if there is any attempt to replair that damage.

Was surprised to see a second crew working on the Fan & Mortar walkway (the Oblong crew is on their weekend), where they were removing the old plastic walkway and replacing it with the newer boards.

Did a quick visit to East Sentinel, where it appears to be back to what I've considered its normal activity, with the murkiness gone.

In the afternoon it was a windy wait for Grand. Once again, I may have arrived during a Turban Eruption Delay. If so, this time it was six Turban eruption intervals before the One Burst Grand Eruption. We also got West Triplet ending just before the Grand eruption.

2025-Jun-13 : 17:31:19 T1Q

 17:30:55	Vent Ovfl	-0m24s
 17:31:05	Turban	-0m14s
 17:31:08	Boop	-0m11s
 17:31:19	B1	--- d=10m22s
 17:34:00	Vent	2m41s
 17:41:41	P1	10m22s
 17:42:54	V&T Quit	11m35s

				     	ΣD=10m22s
	* * * * *
 15:41:38			d=05m25s 	
 15:59:37	Int: 17m59s	d=38s 	
 16:18:37	Int: 19m00s	d=03m41s 	
 16:38:05	Int: 19m28s	d=04m11s 	
 16:56:26	West Triplet d=26m58s 
 16:57:02	Int: 18m57s	d=03m27s 	
 17:14:22	Int: 17m20s	d=03m22s 	
		     Turban: 16m43s

The clouds of the day had cleared out by 22:30, so despite the experience of the morning, no reason to not to head out.

Might have arrived for a Turban Delay interval, because the overflow was strong and the next Turban eruption had no overflow prior.

If that was the case, then we only had a 3 Turban Delay before the One Burst Grand eruption. While the moonlight was clear and bright, I didn't see any moonbows while standing over by West Triplet.

2025-Jun-12 : 00:39:32 T1Q

 00:38:39	Turban	-0m53s
 00:39:32	B1	--- d=09m17s
 00:48:49	P1	9m17s
 01:34:14	V&T Quit	54m42s
Vent & Turban continue

				     	ΣD=09m17s
	* * * * *
Yesterday  23:38:59			d=03m42s 	
Yesterday  23:59:00	Int: 20m01s	d=03m53s 	
 00:17:38	Int: 18m38s	d=03m43s 	
		     Turban: 21m01s

It wasn't until we had left Grand that we realized that Castle was in eruption. Based on the fact that it was transitioning to steam as we walked up to it, the eruption started during Grand's eruption. This time we were able to catch moonbows with a slight hint of color in the spray and mist from the steam.

In the morning, I arrived just in time to catch another Turban Delay interval. West Triplet then erupted in the middle of a series of seven Turban eruptions leading to another One Burst Grand eruption.

2025-Jun-12 : 09:11:57 D7/T1C

 09:11:31	Vent Ovfl	-0m26s
 09:11:38	Turban	-0m19s
 09:11:54	Boop	-0m03s
 09:11:57	B1	--- d=09m01s
 09:14:26	Vent	2m29s
 09:20:58	P1	9m01s
Vent & Turban continue

				     	ΣD=09m01s
	* * * * *
 07:08:10			d=05m06s  D0	
 07:25:15	Int: 17m05s	d=03m58s  D1	
 07:43:14	Int: 17m59s	d=04m18s  D2	
 07:55:53	West Triplet d=30m02s 
 08:02:18	Int: 19m04s	d=03m22s  D3	
 08:19:41	Int: 17m23s	d=03m31s  D4	
 08:37:37	Int: 17m56s	d=03m29s  D5	
 08:55:30	Int: 17m53s	d=03m41s  D6	
		     Turban: 16m08s

During the wait we saw an eruption of Oblong, and unlike most of the others that have been witnessed from there, it had a number of tall burst visible through the steam of the eruption.

With nothing much going in the Upper Basin, decided to try for a mid-afternoon Great Fountain eruption. Arrived at noon to find a low Great Fountain crater.

So took a side trip to check out the road damage at the bridges. It doesn't look good, and I'll be surprised if the road reopens any time soon, because the repairs are more like replace.

The Great Fountain overflow started about 1-1/2 hour later, lasting about 85 minutes. It was windy, so the best observations were from the boardwalk benches. There were some bursts with good height at the beginning, but the first burst sort of gradually turned into the second.

Got back into the Upper Basin where Grand had not erupted and the interval was over seven hours. From the bike rack I saw an eruption of Turban that was so large that at first I thought I was seeing Grand in the late Big Sawmill phase. But no jetting, so I knew that couldn't be it.

A half hour later West Triplet erupted, followed a few minutes later by the One Burst Grand eruption, lasting 9-1/2 minutes. West Triplet ended after that, with no Rift eruption.

2025-Jun-12 : 16:52:06 T1C

 16:51:17	Turban	-0m49s
 16:51:33	Vent Ovfl	-0m33s
 16:51:57	Boop	-0m09s
 16:52:06	B1	--- d=09m33s
 16:54:34	Vent	2m28s
 17:01:39	P1	9m33s
Vent & Turban continue

				     	ΣD=09m33s
	* * * * *
 16:17:19			
 16:34:33	Int: 17m14s	d=03m39s 	
 16:46:57	West Triplet d=32m58s 
		     Turban: 16m44s

By then it was nearly 17 hours since we saw the Castle eruption, so decided to hang around. Over then next 1-1/2 hours the waiting crowd slowly got smaller as Castle was mostly silent with the occasional large splash. Needed time to fix a meal, so finally left around 19:00. Castle had the minor eruption about ten minutes later.

The moon was bright and the sky clear when we went out for the after midnight Grand eruption. That situation slowly deteriorated, with high, thin clouds moving in and staying.

Got out just in time for a long wait for the first Turban eruption. That was preceded by heavy overflow and it was a strong Turban eruption. The next Turban eruption had no overflow, so the Delay count began.

A couple more Turban intervals and we got an eruption of West Triplet. That's when the Turban eruption intervals and durations began to vary in length, with little pattern. At one point there was heavy overflow and an interval under 24 minutes, Another time there was a short Turban eruption and an interval below 15 minutes.

By that time it was getting light and the moon had set. After a second West Triplet eruption, the fifteenth Turban eruption had an interval under 15 minutes, and a length under three minutes. Then we got a second Delay interval of over 32 minutes. It was two more short Turban intervals before Grand finally erupted. With a duration of just over nine minutes, that could've been the only burst, but at least our long wait got a second burst.

2025-Jun-11 : 08:37:00 D16/D3/T2*Q

 08:36:35	Turban	-0m25s
 08:37:00	B1	--- d=09m05s
 08:39:11	Vent	2m11s
 08:46:05	P1	9m05s d=50s
 08:46:55	B2	9m55s d=02m29s
 08:49:24	P2	12m24s
 08:49:35	V&T Quit	12m35s

				     ΣB=11m34s	ΣD=12m24s
	* * * * *
 02:40:27			d=05m10s  D0	
 02:57:09	Int: 16m42s	d=03m43s  D1	
 03:14:52	Int: 17m43s	d=04m04s  D2	
 03:21:16	West Triplet d=29m37s 
 03:33:59	Int: 19m07s	d=03m53s  D3	
 03:53:23	Int: 19m24s	d=03m58s  D4	
 04:11:09	Int: 17m46s	d=03m38s  D5	
 04:30:16	Int: 19m07s	d=03m30s  D6	
 04:49:05	Int: 18m49s	d=03m44s  D7	
 05:13:02	Int: 23m57s	d=04m21s  D8	
 05:30:35	Int: 17m33s	d=03m38s  D9	
 05:46:32	Int: 15m57s	d=03m51s  D10	
 06:03:28	Int: 16m56s	d=03m08s  D11	
 06:09:26	West Triplet d=33m48s 
 06:21:56	Int: 18m28s	d=03m35s  D12	
 06:39:12	Int: 17m16s	d=03m22s  D13	
 06:56:43	Int: 17m31s	d=03m10s  D14	
 07:11:14	Int: 14m31s	d=02m58s  D15	
 07:43:19	Int: 32m05s	 	  D16/D0	
 07:58:55	Int: 15m36s	d=03m14s  D16/D1	
 08:14:56	Int: 16m01s	d=03m23s  D16/D2	
		     Turban: 21m39s

We started to feel raindrops on the way back from that eruption.

After an attempt at catching up on sleep, went out again for Grand. West Triplet was in eruption, and about twenty minutes after that Rift joined in. No Turban Delay intervals this time, but did have to set through about twenty minutes of rain and strong wind as a line of showers passed through. Then the rain stopped, although it was still cloudy with no sun.

An hour and a half into the Rift eruption Grand had a nice steady fill on a normal Turban eruption interval. Grand still took well over a minute to begin erupting, and this time the One Burst Eruption lasted 9-1/2 minutes. On the way back got to see a distant Beehive eruption from next to Sawmill. And once again, there was a hint of rain on the way back.

2025-Jun-11 : 16:11:43 T1C

 16:10:22	Turban	-1m21s
 16:10:42	Vent Ovfl	-1m01s
 16:11:43	B1	--- d=09m30s
 16:14:05	Vent	2m22s
 16:21:13	P1	9m30s
Vent & Turban continue

				     	ΣD=09m30s
	* * * * *
 14:35:46			d=04m23s 	
 14:47:50	Rift
 14:54:47	Int: 19m01s	d=04m06s 	
 15:15:09	Int: 20m22s	d=03m57s 	
 15:34:44	Int: 19m35s	d=03m18s 	
 15:51:25	Int: 16m41s	d=03m22s 	
		     Turban: 18m57s

Expected a Rift eruption overnight, did not expect to wake up at dawn and find that Grand had yet to erupt. It was around the nine hour mark, so I decided I could run out without much of a wait. Instead, the One Burst Grand Eruption started a few minutes later, so I need not head out.

A bit later I walked over to Geyser Hill and from there to check and confirm that Rift did erupt. Then back to Geyser Hill to wait a hour for Beehive. The winds, which had been mostly calm, picked up during the Indicator eruption, heading directly for the walkway. At first when Beehive started I retreated toward Scissors Spring, then decided it was better to run through the downpour and get behind the water column. I still ended up getting pretty wet, and it was a cool cloudy day.

Afterwards spent some time at Aurum, as it also was having what appeared to be a long interval. With multiple bison on Geyser Hill, I decided I'd rather not get trapped over there and went back to the cabin. (It was around this time that someone got knocked down by a bison over by the Inn. Later in the day it sounded like this bison charged a second touron.)

At Grand, we got a 35 minute Turban eruption interval. During this time the sky cleared and it started to feel much warmer. After that Delay, there followed three intervals later a second Delay Turban interval. At least this time Grand had the One Burst Eruption with the second Delay.

2025-Jun-10 : 13:07:15 D3/D0/T1Q

 13:07:11	Boop	-0m04s
 13:07:12	Turban	-0m03s
 13:07:15	B1	--- d=11m05s
 13:07:20	Vent Ovfl	0m05s
 13:10:14	Vent	2m59s
 13:18:20	P1	11m05s
 13:19:19	V&T Quit	12m04s

				     	ΣD=11m05s
	* * * * *
 11:15:12			
 11:28:52	Int: 13m40s	d=03m51s 	
 12:04:18	Int: 35m26s	d=05m08s  D0	
 12:23:13	Int: 18m55s	d=04m20s  D1	
 12:42:04	Int: 18m51s	d=04m16s  D2	
		      Grand: 25m11s

During the afternoon it got cloudy and windy, but no rain. By the time of the evening Grand eruption the sky was clearing and the sun visible between the clouds.

During the afternoon it got cloudy and windy, but no rain. For a while it looked like it might clear up a bit, but by the time of the evening Grand eruption the sky was overcast and it was windy (the latter kept the mosquitos away).

The three Turban eruptions prior to the One Burst Grand eruption had durations of either 4m18s or 4m17s, but the intervals kept getting longer. The West Triplet started to erupt. The eruption started with an explosion on a Turban Delay interval under 26 minutes long. Vent & Turban looked like they might quit but after about 1m20s Turban's activity picked up. West Triplet stopped erupting at some point late in the Grand eruption.

2025-Jun-10 : 20:19:29 D0/G1C

 20:19:25	Vent Ovfl	-0m04s
 20:19:29	B1	--- d=10m19s
 20:19:31	Turban	0m02s
 20:22:21	Vent	2m52s
 20:29:48	P1	10m19s
Vent & Turban continue

				     	ΣD=10m19s
	* * * * *
 18:54:45			
 19:13:22	Int: 18m37s	d=04m18s 	
 19:33:25	Int: 20m03s	d=04m18s 	
 19:53:45	Int: 20m20s	d=04m17s 	
 19:59:30	West Triplet d=28m07s 
		      Grand: 25m44s

Seeing Grand in eruption as I approached the Inn meant there was no reason to continue onward.

Noticed that Great Fountain had been seen nine hours previously, so it made sense to do an early morning trip out there. Arrived to find it in overflow. Fifty minutes later we got an adequate eruption, since it was still calm and the steam obscuring was at a minimum.

Grand could've erupted before noon, but instead we got a pair of Turban Delay intervals that pushed eruption into the same time frame that it's been in the last few days. At least we got a nice two burst eruption. It lasted ten minutes with Vent & Turban quitting after no attempt at a third burst. West Triplet finally erupted after Grand had ended.

2025-Jun-09 : 13:57:01 D3/D5/G2Q

 13:57:01	B1	--- d=08m40s
 13:57:24	Vent Ovfl	0m23s
 13:57:42	Turban	0m41s
 14:00:17	Vent	3m16s
 14:05:41	P1	8m40s d=19s
 14:06:00	B2	8m59s d=01m01s
 14:07:01	P2	10m00s
 14:08:12	V&T Quit	11m11s

				     ΣB=09m41s	ΣD=10m00s
	* * * * *
 11:20:41			d=05m12s  D0	
 11:38:18	Int: 17m37s	d=04m29s  D1	
 11:56:52	Int: 18m34s	d=03m45s  D2	
 12:28:05	Int: 31m13s	d=04m43s  D3/D0	
 12:45:27	Int: 17m22s	d=03m07s  D3/D1	
 13:03:12	Int: 17m45s	d=04m03s  D3/D2	
 13:20:46	Int: 17m34s	d=03m27s  D3/D3	
 13:39:03	Int: 18m17s	d=03m32s  D3/D4	
		      Grand: 17m58s

The wind had picked up during the Grand wait, so there wasn't much expectation of height in the afteroon Beehive eruption. But it died down a bit, and people at the south end only had to retreat to a little pocket of dryness near Anemone.

Went out about an hour before sunset with a pack filled with all the gear needed for a long nighttime wait. Expected to see Rift in eruption, but it wasn't. Ended up never getting any of that gear out of the pack, as the One Burst Eruption started at the last opportunity to have the sun above the ridge. The eruption ended just as the sun disappeared. This was a fair trade-off-- sunset eruption instead of full moonlight eruption.

It seems that lately we are having Vent & Turban quit even on the relatively short one burst eruption, and this was yet another case.

2025-Jun-09 : 20:33:45 G1Q

 20:33:45	B1	--- d=10m23s
 20:33:55	Vent Ovfl	0m09s
 20:34:07	Turban	0m22s
 20:36:46	Vent	3m00s
 20:44:09	P1	10m23s
 20:45:09	V&T Quit	11m23s

				     	ΣD=10m23s
	* * * * *
 19:54:46ie			
 20:13:35	Int: 18m49s	d=04m09s 	
		      Grand: 20m10s

When I woke up at 05:30, I wasn't surprised to see that there wasn't a report for Grand in the last few hours. I was surprised to get out there just after 06:00 to find a full pool and West Triplet erupting. On over 8-1/4 hour interval, and Rift not to blame.

Before that, from the bike rack at Castle, I saw Penta in a fairly strong steam-phase eruption. By the time I got there the water in the runoff had almost reached the boardwalk. Was still going strong, so I recorded a couple of minutes of video.

West Triplet ended right after I arrived, so I expected the next Turban eruption would lead to Grand erupting too. Instead, got an hour's worth of Turban eruptions where the intervals were under 17 minutes. The One Burst Grand eruption finally started 66 seconds after Turban started.

2025-Jun-08 : 07:07:57 T1C

 07:06:51	Turban	-1m06s
 07:07:57	B1	--- d=09m54s
 07:10:10	Vent	2m13s
 07:17:51	P1	9m54s
Vent & Turban continue

				     	ΣD=09m54s
	* * * * *
 06:06:13	West Triplet
 06:16:40			d=04m22s 	
 06:33:18	Int: 16m38s	d=03m33s 	
 06:49:49	Int: 16m31s	d=03m34s 	
		     Turban: 17m02s

In the Sawmill Group Uncertain was gurgling and splashing. After about 25 minutes of this, we finally got an Uncertain eruption of sorts. The start was not abrupt, but consisted of the splashing getting stronger and taller with more overflow until finally the weak jetting was continuous. The height was less than two meters, but around normal length, dying down to heavy steam. At that point, Sawmill had one of its half-minute eruptions where there wasn't any overflow.

Beehive was also having a long interval. I was there less than five minutes before water was visible in Beehive's Indicator. What little wind there was was blowing toward the river, so up by Plume we got a nice bright double half-rainbow.

Decided it was too nice to stay indoors, so went to try our luck in the Lower Basin. Got to the entrance to Firehole Lake Drive to discover that Great Fountain was already in eruption, so no point in biking out there. Continued on to Fountain Paint Pots to see quiet Fountain Group. Even Clepsydra was quiet. Didn't stick around there either.

Midday it was time for Rift. The Turban eruption interval after I arrived was at least 32 minutes long, so we also had a Turban Delay Interval to deal with. As it turned out, Rift ended first, after being active for almost two hours. Grand finally had the One Burst Eruption on the sixth Turban eruption interval, or one Turban interval after the end of Rift's eruption.

2025-Jun-08 : 15:07:11 D6/T1C

 15:06:54	Vent Ovfl	-0m17s
 15:06:55	Turban	-0m16s
 15:07:03	Boop	-0m08s
 15:07:11	B1	--- d=10m00s
 15:09:41	Vent	2m30s
 15:17:11	P1	10m00s
Vent & Turban continue

				     	ΣD=10m00s
	* * * * *
 12:44:58			
 12:44:58ie	Rift
 13:16:13	Int: 31m15s	d=05m01s  D0	
 13:34:46	Int: 18m33s	d=03m47s  D1	
 13:52:34	Int: 17m48s	d=03m52s  D2	
 14:10:29	Int: 17m55s	d=03m36s  D3	
 14:30:21	Int: 19m52s	d=03m37s  D4	
 14:49:36	Int: 19m15s	d=03m13s  D5	
		     Turban: 17m19s

Afterwards it was interesting that Belgian and Crystal, which had been low when I arrived, were now full. Crystal was even having its pulsation heavy overflows. Bulger, however, was only having minor eruptions, so an eruption of Bulger's Hole seemed unlikely.

By the time I arrived after sunset for the next Grand eruption, Belgian and Crystal had dropped considerably, from 15cm to 20cm. Sawmill was in eruption, but soon quit. Uncertain was showing water, acting like it was going to erupt, but then Sawmill had another eruption which lasted about a half hour. It wasn't until then that Uncertain finally erupted.

The wait for Grand was only 1-1/2 hours, a series of ordinary Turban eruptions and intervals. When Grand finally erupted, it was one of those starts where Turban erupts vigorously while Grand waits about a minute before starting. The One Burst Grand eruption by moonlight was quite nice, and it lasted eleven minutes.

2025-Jun-08 : 22:51:37 T1Q

 22:50:42	Turban	-0m55s
 22:51:37	B1	--- d=11m01s
 22:54:14	Vent	2m37s
 23:00:58	FP	9m21s
 23:02:38	P1	11m01s
 23:03:30	V&T Quit	11m53s

				     	ΣD=11m01s
	* * * * *
 20:58:54			d=04m51s 	
 21:16:28	Int: 17m34s	d=03m51s 	
 21:35:54ie	Int: 19m26s	
 21:54:19	Int: 18m25s	d=03m55s 	
 22:14:01	Int: 19m42s	d=03m50s 	
 22:32:02	Int: 18m01s	d=04m19s 	
		     Turban: 18m40s