Observations for 2026 September 17


With an empty crater and Turban erupting without Vent, I knew that Grand had had a short interval and erupted a while earlier. So it was down to the Bijou Cage as the rain started. Grotto was erupting as I walked past, and Rocket began as I got near the GIP.

Then ended up waiting an hour in intermittent showers until we got a Standard Bathtub that had a two minute Bijou pause. At that point it was time to head in for a bit. Of course the rains restated as I biked in.

When it was time to go out to Grand, I was greeted with Rift in eruption, and West Triplet drained and drying out. After half an hour, Rift also quit. An hour after that, Grand had a long Turban eruption interval for a Turban Delay.

By the time Rift ended, the rains had started. It wasn't too unpleasant, as there wasn't any wind, but hard enough that I never noticed that Castle had erupted until I heard the late steam. But after a couple of post-Delay Turban eruptions, the rain stopped and then the winds picked up. By the time that Grand had a second Turban Delay interval, they were strong out of the south, making it hard to see the pool or Turban. The long One Burst Grand started with what appeared to be a series of large boops, and I was never able to determine a start time on Turban.

2026-Sep-17 : 12:48:23 D3/D0/G1Q

 12:48:23	B1	--- d=11m57s
 12:51:08	Vent	2m45s
 13:00:20	P1	11m57s
 13:00:31	V&T Quit	12m08s

				     	ΣD=11m57s
	* * * * *
 10:31:09			d=04m08s	
 10:53:25	Int: 22m16s	d=03m57s	
 11:13:10	Int: 19m45s	d=04m15s	
 11:46:22	Int: 33m12s	d=04m13s D0	
 12:03:23	Int: 17m01s	d=03m29s D1	
 12:23:10	Int: 19m47s	d=03m30s D2	
		      Grand: 25m13s

Later in the afternoon, it was still breezy but the sun was occasionally making an appearance. I finally set up the camera in the Bijou Cage for the first time since Giant erupted. After an hour-and-a-half wait, I ended up catching a Standard Bathtub with Bijou not pausing.

Going out to Grand in the evening seemed like a good idea, but first I got to see and eruption of West Triplet, which ended without Grand erupting. Then the relatively nice weather turned wet, with a storm passing by. It was too late to make a run for it, and decided waiting it out was the better option than getting soaked by riding the bike back to the cabin.

After a couple of Turban eruption intervals, the rain stopped and the clouds disappeared, although there was a lot of lightning visible to the northwest. The next few Turban intervals were short, as was the One Burst Grand eruption.

2026-Sep-17 : 22:56:40 T1C

 22:56:05	Turban	-0m35s
 22:56:40	B1	--- d=09m11s
 23:05:51	P1	9m11s
Vent & Turban continue

				     	ΣD=09m11s
	* * * * *
 19:14:51			d=04m23s	
 19:35:31	Int: 20m40s	d=04m11s	
 19:40:22	West Triplet
 19:53:32	Int: 18m01s	d=03m57s	
 20:14:05	Int: 20m33s	d=03m33s	
 20:34:06	Int: 20m01s	d=03m29s	
 20:52:43	Int: 18m37s	d=03m47s	
 21:11:03	Int: 18m20s	
 21:29:56	Int: 18m53s	
 21:46:23	Int: 16m27s	d=03m03s	
 22:03:37	Int: 17m14s	d=03m00s	
 22:21:34	Int: 17m57s	
 22:39:32	Int: 17m58s	d=03m47s	
		     Turban: 16m33s