Observations for 2025 June 06


Went out to Grand expecting the next eruption to be in the dark. Did not expect it to be well after midnight.

At around the time I would have expected the eruption we got a strong, heavy overflow from Grand and the Turban eruption interval was 24-1/2 minutes. While not a Delay as defined, Grand and Turban acted as if it was for the rest of the wait. The durations on Turban eruptions got shorter as did the intervals. The final Turban eruption interval preceeding the explosive start of the One Burst Grand eruption was less than 14 minutes, and it took Turban over a minute to finally begin its eruption. The lighting by the moon, and the obscuring steam wasn't too bad, but not bright enough for us to seen any moonbows.

2025-Jun-06 : 00:21:43 T1Q

 00:20:34	Turban	-1m09s
 00:21:43	B1	--- d=10m24s
 00:23:44	Vent	2m01s
 00:32:07	P1	10m24s
 00:33:11	V&T Quit	11m28s

				     	ΣD=10m24s
	* * * * *
◀︎ 20:18:47			d=03m31s 	
◀︎ 20:38:20	Int: 19m33s	d=04m04s 	
◀︎ 20:57:16	Int: 18m56s	d=04m13s 	
◀︎ 21:18:04	Int: 20m48s	d=03m44s 	
◀︎ 21:35:41	Int: 17m37s	d=03m48s 	
◀︎ 21:55:08	Int: 19m27s	d=03m52s 	
◀︎ 22:19:34	Int: 24m26s	d=04m50s 	
◀︎ 22:36:13	Int: 16m39s	d=04m02s 	
◀︎ 22:53:59	Int: 17m46s	d=04m03s 	
◀︎ 22:59:39	West Triplet d=26m50s 
◀︎ 23:12:26	Int: 18m27s	d=03m23s 	
◀︎ 23:32:20	Int: 19m54s	d=03m35s 	
◀︎ 23:49:17	Int: 16m57s	d=03m15s 	
  00:06:38	Int: 17m21s	d=03m31s 	
		     Turban: 13m56s

Came back out after dawn, and this time there was no wait for the One Burst Grand eruption. What little air movement was toward the south, although there was a steady rain mist coming down to the northern boardwalk were there was the view.

2025-Jun-06 : 07:23:51 G1Q

 07:23:51	B1	--- d=11m16s
 07:24:19	Vent Ovfl	0m28s
 07:24:35	Turban	0m44s
 07:27:26	Vent	3m35s
 07:35:07	P1	11m16s
 07:35:50	V&T Quit	11m59s
 07:48:04	V&T Restart	24m13s

				     	ΣD=11m16s
	* * * * *
 06:46:17			
 07:02:55	Int: 16m38s	d=03m58s 	
		      Grand: 20m56s

Checked out Economic before both eruptions. For the first, Economic was low, with the water level inside the inner rim and many of the runoff channels (especially the one under the boardwalk) showed no sign of being wet recently. For the second visit, Economic was in steady overflow and the under boardwalk runoff was wet.

Went down basin to take a look at the progress (or lack thereof) in rebuilding the boardwalk south of Giant. There old walkway has only been partly removed, and from a distance I could not seen any new sections. On the way back, I did manage to get a Rocket major eruption.

Like the morning eruption, we didn't have a long wait for the One Burst Grand eruption. An otherwise undistinguished eruption at midday with weather that was nicely sunny but a bit breezy at times.

After the Grand eruption, West Triplet started to erupt. As a Rift eruption is expected by midday tomorrow, I waited around for the end. It only lasted eight minutes, so no Rift eruption for at least a few more hours. Just before I left, Grand started having some small afterplay.

2025-Jun-06 : 14:10:43 G1Q

 14:10:40	Boop	-0m03s
 14:10:43	B1	--- d=10m19s
 14:11:23	Vent Ovfl	0m40s
 14:11:40	Turban	0m57s
 14:14:21	Vent	3m38s
 14:21:02	P1	10m19s
 14:22:33	V&T Quit	11m50s
 14:30:42	V&T Restart	19m59s

				     	ΣD=10m19s
	* * * * *
 13:31:44			d=05m15s 	
 13:49:10	Int: 17m26s	d=04m01s 	
		      Grand: 21m33s

Was not surprised to see Rift in eruption when I came out for the next Grand eruption. Ended up waiting through a two hour series of Turban eruptions where the durations were short (around 3-1/2 minutes) while the intervals got shorter. Once they got around 16 minutes, I noticed that Rift was dying down. Half hour later, it quit as Grand started to erupt. We got a well lit two burst eruption where the durations were reasonable and ordinary.

2025-Jun-06 : 22:07:05 G2Q

 22:07:05	B1	--- d=08m48s
 22:07:08	Turban	0m03s
 22:09:30	Vent	2m25s
 22:15:53	P1	8m48s d=48s
 22:16:41	B2	9m36s d=47s
 22:17:28	P2	10m23s
 22:18:15	V&T Quit	11m10s

				     ΣB=09m35s	ΣD=10m23s
	* * * * *
 19:58:12			
 19:52:11	Rift ie
 20:13:52	Int: 15m40s	d=04m17s 	
 20:33:01	Int: 19m09s	d=03m41s 	
 20:50:39	Int: 17m38s	d=03m37s 	
 21:08:27	Int: 17m48s	d=03m24s 	
 21:24:41	Int: 16m14s	d=03m28s 	
 21:44:31	Int: 19m50s	d=03m29s 	
		      Grand: 22m34s

Just before Grand, Beehive erupted. I watched it from the Sawmill Group.

Beehive Geyser eruption 2025 Jun 06 21:57

It seems like every day over the radio I hear at least one report of a "thermal trespass" in the Biscuit Basin closure. I have yet to hear of anyone being cited for entering that closure. All that happens is that some or all of the group gets an identity check and a verbal warning. So if you are willing to risk the possibility of having a lifetime record in the national Dept. Of Interior "DOI-10 Incident Management, Analysis and Reporting System (IMARS)", you can get out there and look around and shoot your videos and selfies.

Plan ahead. Go out in the morning when the fog will help hide you. Go in from the Mystic Falls trailhead. Carry a radio that's tuned to the West Direct and West Repeater channels so you know when you've been spotted. Wear a bit of a disguise, in case you are seen. Something you would normally never wear, like a bright red MAGA ballcap, or a fluorescent orange jacket. Something that could easily be used as identification from a distance, and easily hidden when needed.

If you do get cited, have a lawyer ready so you can file a discrimination lawsuit. Just because you aren't a foreign tourist (frequent culprits) and despite your have spent years visiting this park, that doesn't mean you should not receive a verbal warning like everyone else. Enjoy!


I've been informed that 'coy' is an acronym from wildlife management jargon meaning "cub of year", a term that has escaped into the wild. I guess it's not surprising that a group that seems to enjoy using terms like "stall", or "crash", or "ernesto", or "delay" would readily adopt it.