[Geysers] Grand without Grand?

[David Schwarz]

   This is normal post-eruptive behavior for Grand.  Every so often it
catches someone by surprise because no one--well, almost no
one--deliberately goes to Grand 15 minutes to an hour after the end of an
eruption.

   Immediately after an eruption, Vent and Turban may either continue or
quit.  If they quit, they will restart exactly as the visitors described a
few minutes later--first Turban, then Vent.  Grand usually splashes from an
empty pool on and off for a good while after an eruption--this is called
"afterplay."  If Vent and Turban don't quit at the end of the eruption, and
afterplay begins faster than usual (it usually takes about 15 minutes), it
can build into a full eruption from a low pool.  This is an afterburst.
 Multiple afterbursts have been known to occur on the same eruption.

   Vent and Turban can stop and restart repeatedly in the hours following
an eruption.

David Schwarz

On Fri, May 18, 2012 at 10:22 PM, Will Boekel <wolveslax65 at comcast.net>wrote:

>   Janet White sent me this email to forward to the list because her
> normal email was not working. I am posting this on her behalf.
>
> Will Boekel
>
>
> BEGIN ORIGINAL MESSAGE FROM JANET WHITE
>
>
> 5/18/2012
>
> My husband and I decided to walk down and see if we could catch and
> evening light Grand after dinner tonight. We walked to Castle and over, so
> if it erupted we would have thought we should have seen and heard it. We
> didn't. Sawmill Group was in a deep drain - my notes say at 1920. We spent
> a few minutes at Spasmodic because of the steam spray coming out from the
> right vent. Then we headed over to Grand. When we got there, Grand's pool
> was empty - like after an eruption empty. Vent and Turban were ie - Vent
> was tall. Rift was off. West Triplet was standing at half full, calm water.
> Percolator was off. But Grand was sending up jets of water that barely
> reached the top of Turban's eruption. I took a video and photos.
>
> I asked a visitor that was already there if they saw Grand erupt, and they
> said no. They saw it two days ago, so they knew what they should see. They
> also said that Vent had just started - at ~1920ns and that they thought
> Turban was already ie. Finally Vent and Turban quit at 1948.
>
> Ideas on what happened?
>
> Janet White
>
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> 
>
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