Observations for 2026 May 23


Went out to Geyser Hill to enjoy the nicest weather since our arrival, on the off chance Beehive might eruption. It didn't, so I headed in to reconfigure and go back out to Grand.

Saw Turban erupting as I was tying down my bike. Fortunate, as this was followed a Turban Delay interval of over 32 minutes. That Turban eruption coincided with the eruption of Beehive.

An hour later, a visitor noticed a bear ambling across the flats to the north. It passed by Beauty, crossed the boardwalk and then headed off into the trees.

Grand finally had the One Burst Eruption after seven Turban eruption intervals ending with another Delay Interval. The wind was strong from the south and the start didn't seem that tall.

2026-May-23 : 12:22:52 D7/D0/G1C

 12:22:50	Boop	-0m01s
 12:22:52	B1	--- d=10m11s
 12:23:52	Turban	1m00s
 12:25:54	Vent	3m01s
 12:33:03	P1	10m11s
Vent & Turban continue

				     	ΣD=10m11s
	* * * * *
 09:27:11			
 09:59:10	Int: 31m59s	d=04m50s  D0	
 10:17:03	Int: 17m53s	d=04m10s  D1	
 10:37:09	Int: 20m06s	d=03m45s  D2	
 10:57:04	Int: 19m55s	d=04m01s  D3	
 11:17:21	Int: 20m17s	d=03m35s  D4	
 11:35:54	Int: 18m33s	d=03m39s  D5	
 11:53:21	Int: 17m27s	d=03m40s  D6	
		      Grand: 29m31s

Late evening it was back out to Grand with the expectation of a long wait. Had extra layers and the light, just in case. Turned out it wasn't necessary, as I only had to wait for one Turban eruption interval. At the start of that interval, West Triplet began to erupt, and Castle had a minor eruption during that time. Grand's pool had a nice, steady fill, and the One Burst Eruption without any Delay.

At around the 8-1/2 minute mark, Grand slowed down, acting like every jet was going to be the last one of the burst. It wasn't even a Big Sawmill mode. Then the activity picked up once any chance of a second burst was gone.

2026-May-23 : 18:44:37 G1Q

 18:44:31	Vent Ovfl	-0m06s
 18:44:34	Boop	-0m03s
 18:44:37	B1	--- d=10m23s
 18:44:48	Turban	0m11s
 18:47:46	Vent	3m09s
 18:55:00	P1	10m23s
 18:55:59	V&T Quit	11m22s
 19:05:42	V&T Restart	21m05s

				     	ΣD=10m23s
	* * * * *
 18:24:27			
 18:28:49ns	West Triplet
 19:17:01	Rift
		      Grand: 20m10s

I then waited for the start of Rift. It took its time, but 45 minutes into the West Triplet eruption, suddenly Rift started steaming and within a few minutes was in eruption. I didn't wait for West Triplet to end.

Instead went down basin for the first time this visit, and spent 40 minutes watching Fan & Mortar. There was no change during that time. River Vent was steaming the whole time. Bottom Vent was splashing strongly, but there was little runoff. Main Vent was strong and noisy, with some bursts and splashing well above the back rim, with heights up to two meters.