Posted on

Observations for 2023 August 25


Not knowing when Grand erupted overnight, I went out at the twelve hour mark. Turned out that was a bit early, but I did get to see Castle have a major eruption after having a second minor eruption overnight. Grand also had an early Turban Delay interval. About 32 minutes in, I heard a boil or boop from Grand. It was another three minutes until Turban finally erupted, so a boop then fits the usual pattern.

On the second Turban interval, Grand's pool looked good enough to erupt, but didn't, and it took Grand two more Turban eruptions before we got the One Burst Grand eruption. Beehive also erupted during that wait.

2023-Aug-25:11:20:27 D4/T1Q

11:20:16	Turban		-0m10s
11:20:23	Vent Ovfl	-0m03s
11:20:27	Grand B1	---	d=10m49s
11:23:17	Vent		2m50s
11:31:16	P1		10m49s
11:32:19	V&T Quit	11m52s

				     	ΣD=10m49s
	* * * * *
09:33:50			
10:06:38	Int: 32m48s	d=5m46s  D0 Boop: 10:03:57	
10:25:10	Int: 18m32s	d=4m36s  D1	
10:44:22	Int: 19m12s	d=3m48s  D2	
11:01:57	Int: 17m35s	d=4m25s  D3	
		     Turban: 18m19s

For the afternoon Grand eruption there was finally no Turban Delay interval. Just a series of Turban eruptions. The interval was about one Turban Interval longer than expected, at just over 6-1/2 hours. Just before Grand did erupt I saw what I thought was Uncertain. It was hard to tell, as at first it was a thin, continuous water column about as high as an Uncertain eruption. Then the column was interrupted by pauses, and finally just quit without going into a mild steam phase. It was just Tardy having one of its weird Sawmill Group Deep Drain eruptions. It was hard to tell at first without landmarks (or tourists standing nearby) and because it just didn't look like Tardy.

The Grand eruption itself had an 8m20s first burst, nicely followed by a second. Grand's vent showed water for a third, but drained after about ten seconds. Was a bit surprised to see Vent & Turban continue.

2023-Aug-25:17:59:51 G2C

17:59:48	Boop		-0m02s
17:59:51	Grand B1	---	d=8m23s
18:00:40	Vent Ovfl	0m49s
18:00:45	Turban		0m54s
18:03:48	Vent		3m57s
18:08:14	P1		8m23s	d=0m40s
18:08:55	B2		9m04s	d=0m53s
18:09:49	P2		9m57s
Vent & Turban continue

				     ΣB=9m17s	ΣD=9m57s
	* * * * *
16:41:13			
16:57:18	Int: 16m05s	d=4m14s 	
17:18:03	Int: 20m45s	d=3m30s 	
17:38:29	Int: 20m26s	d=4m28s 
		      Grand: 21m22s