[Geysers] Grand without Grand?

[Andiy Wagner]

I have seen it erupt from an empty pool and have two bursts. That shocked
the heck out of everyone. But yeah I have also seen it throw mild water
after an eruption. but never 200 feet high as it did last time. Scared the
crap out of my dad and I when were walking past assuming it had already
done.
A

On Sat, May 19, 2012 at 8:48 AM, David Schwarz <
david.schwarz at alumni.duke.edu> wrote:

>
>    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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