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Observations for 2025 September 07


The moon was nearly full, but the sky and view seemed off, thanks to the considerable smoke still in the air. Shadows were faint and indistinct, and filled in from light scatter by the smoke.

With Grand having erupted during Rift the previous evening, it was hoped that this next Grand eruption interval would be shorter than average. Instead, several Turban eruption intervals after arrival there was a longer Turban interval. It wasn't long enough to be considered a formal Delay, but it felt much like one. Afterwards, the next Turban eruption was accompanied by no runoff from Grand, also typical of a Delay type eruption.

During the wait, I kept checking the weather radar map, because there was a small patch of showers that first appeared over Jackson Lake, and was slowly moving north. Every time I looked, it seemed like it was about an hour away.

So it took Grand five Turban eruption intervals to finally have its One Burst Eruption.. Turban started well before Grand. By that time the clouds had started to move in, so the moonlight, combined with steam from the water column in windless conditions, made viewing difficult. No chance for moonbows.

2025-Sep-07 : 03:19:29 T1Q

 03:18:59	Turban	-0m30s
 03:19:29	B1	--- d=10m59s
 03:21:58	Vent	2m29s
 03:30:28	P1	10m59s
 03:31:27	V&T Quit	11m58s

				     	ΣD=10m59s
	* * * * *
 00:52:59			d=03m52s 	
 01:12:37	Int: 19m38s	d=03m54s 	
 01:35:13	Int: 22m36s	d=03m39s 	
 01:51:46	Int: 16m33s	d=03m40s 	
 02:10:41	Int: 18m55s	d=03m51s 	
 02:27:54	Int: 17m13s	d=03m43s 	
 02:45:20	Int: 17m26s	d=03m37s 	
 03:02:53	Int: 17m33s	d=03m34s 	
		     Turban: 16m06s

Some point after we returned to the cabin, the showers finally came through, as everything was wet when awakened by the call that Beehive's Indicator was erupting. Didn't have enough time to make it out of the cabin area before the Beehive eruption started.

Thanks to the longer intervals, Grand was finally going to have an eruption wait starting at a new time of day. West Triplet was in eruption, quitting without a Rift eruption. As it ended, Grand had a long Turban Delay interval. Three Turban eruptions later, we got another long wait as the pool slowly filled, but never started pulsations until the last minute.

Even after Turban started, it seemed Grand was reluctant to erupt. The Vent overflow was well after Turban started, and then Grand had at least 15 seconds of Boops before finally erupting. The first burst lasted well under nine minutes, and there was a short pause. Then the second burst lasted almost two minutes. After the eruption, it took Vent & Turban, which quit, about twenty minutes to restart.

2025-Sep-07 : 11:54:32 D3/D0/T2*Q

 11:53:50	Turban	-0m42s
 11:54:06	Vent Ovfl	-0m26s
 11:54:16	Boop	-0m16s
 11:54:32	B1	--- d=08m44s
 11:56:59	Vent	2m27s
 12:03:16	P1	8m44s d=22s
 12:03:38	B2	9m06s d=01m58s
 12:05:36	P2	11m04s
 12:06:21	V&T Quit	11m49s
 12:28:00	V&T Restart	33m28s

				     ΣB=10m42s	ΣD=11m04s
	* * * * *
 10:07:51ie	West Triplet
 10:12:44			d=03m38s 	
 10:46:30	Int: 33m46s	d=05m20s  D0	
 11:04:52	Int: 18m22s	d=03m52s  D1	
 11:22:06	Int: 17m14s	d=03m37s  D2	
		     Turban: 31m44s

Went out for Grand's first overflow, which was relatively short at 4h17m. Once again, this took place during an eruption of West Triplet and a Turban Delay interval.

Made it back to the cabin just ahead of the first thunderstorm. The second one featured raisin sized hail that turned the area white, along with at least one lightning strike nearby, as I saw now flash but heard what sounded like a gunshot.

The rains continued up to the time to head back out for the next Grand eruption, and I decided I'd rather not get wet for a One Burst Eruption, or even a two burst eruption.