Observations for 2025 June 08


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