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Observations for 2026 September 11


Didn't get much sleep during the night, as I was busy documenting and editing and uploading videos. When the video upload process showed it was going to take over 200 hours, I knew I needed to make the file a bit smaller. Five hours was much better, and it probably took less, as it was available to post during the night

By then it was getting light outside, so might as well head out to Grand, which was approaching 14 hours since the previously seen eruption. But first, I headed back to the Bijou Cage to document the locations of the various signs.

Finally got to Grand, just in time to catch the start of a West Triplet eruption. That was followed by a Turban Delay Interval, one where the heavy runoff didn't start until the 30 minute mark. The interval was so long that Rift started during the Turban eruption.

The West Triplet eruption lasted almost exactly an hour, and about a half hour later, Grand filled nicely on a long Turban eruption interval that resulted in a One Burst Eruption.

2026-Sep-11 : 08:50:53 D3/G1Q

 08:50:51	Boop	-0m02s
 08:50:53	B1	--- d=10m42s
 08:50:54	Vent Ovfl	0m01s
 08:51:05	Turban	0m12s
 08:54:13	Vent	3m20s
 09:01:35	P1	10m42s
 09:02:29	V&T Quit	11m36s

				     	ΣD=10m42s
	* * * * *
 07:13:20			d=04m22s	
 07:17:12	West Triplet
 07:50:30	Int: 37m10s	d=04m55s D0	
 07:54:07	Rift
 08:09:19	Int: 18m49s	d=02m30s D1	
 08:28:56	Int: 19m37s	d=04m07s D2	
		      Grand: 21m57s

Tried to wait for Beehive after that, but it was so windy and miserable that most of the people waited decided to let someone else stay there. Which was why it appears that no one actually saw the start of the eruption of the Indicator, as everyone had left. The Beehive eruption was still nice, despite the wind.

At that point, there wasn't much to do around the basin, which meant it was a good day to take care of various housekeeping chores which had been postponed due to the waiting in the Bijou Cage.

Got back out to Grand just after the six hour mark. Immediately got a Turban Delay Interval eruption, which meant it was going to be a bit of a wait. Seven turban eruption intervals later, we got a second Delay Interval. By that time, it was getting stormy to the north, and the wind was making the whole wait as miserable as one on Geyser Hill. By this time, it had been over three hours without any activity from West Triplet. An hour later West Triplet started to erupt, but finished within a couple of minutes.

That seems to have been sufficient activity to qualify for the opening of the West Triplet window, as Grand finally erupted 20 minutes later. Grand's pool was full and having waves at the 13 minute mark when Turban started. Turban started out slow, then suddenly began acting like it does when Grand erupts. The second burst consisted of over two minutes of some of the smallest Big Sawmill activity I've seen in quite a while. Grand repeatedly looked like it was stopping, only to boil up a few meters high, then have some small jets.

2026-Sep-11 : 19:17:53 D7/D5/T2*Q

 19:17:20	Turban	-0m33s
 19:17:23	Vent Ovfl	-0m29s
 19:17:47	Boop	-0m05s
 19:17:53	B1	--- d=08m06s
 19:20:04	Vent	2m11s
 19:25:59	P1	8m06s d=18s
 19:26:18	B2	8m25s d=02m45s
 19:29:04	P2	11m10s
 19:30:04	V&T Quit	12m11s

				     ΣB=10m52s	ΣD=11m10s
	* * * * *
 15:02:04			
 15:35:03	Int: 32m59s	d=03m42s D0	
 15:51:56	Int: 16m53s	d=03m09s D1	
 16:09:40	Int: 17m44s	d=02m56s D2	
 16:26:33	Int: 16m53s	d=02m45s D3	
 16:46:07	Int: 19m34s	d=02m57s D4	
 17:05:42	Int: 19m35s	d=03m01s D5	
 17:22:23	Int: 16m41s	d=02m57s D6	
 17:55:01	Int: 32m38s	d=03m30s D7/D0	
 18:11:19	Int: 16m18s	d=03m04s D7/D1	
 18:29:24	Int: 18m05s	d=03m30s D7/D2	
 18:45:39	Int: 16m15s	d=02m56s D7/D3
 18:55:35ns	West Triplet d=02m13s
 19:04:10	Int: 18m31s	d=03m07s D7/D4
		     Turban: 13m09s