[Geysers] Fan and Mortar 7/27/10 Details

[Karen Webb]

You're doing great, Scott! Keep 'em coming!
Karen Webb

scott grisso wrote:
> This is my second post on the listserve.  As with the first, I am 
> still learning what to watch for on Fan and Mortar.  I think my notes 
> were a little better this time, but they are not perfect.  Tara and 
> Cynthia Barwin may both have details to add, but I'll share what I have.
>
> I arrived at Fan and Mortar around 0400 to relieve Tara and Suzanne 
> Strasser.  Cynthia Barwin arrived before 0700, and Thomas Barger 
> arrived before 0800.  Karen Low also spent a large part of her day 
> with us.  The event that led to the eruption was somewhat screwy, and 
> they all helped me figure out what to say with the radio calls, 
> especially at the start of the event cycle.
>
> I called three event cycles in the morning, none of them very 
> intriguing.  The third event was called dead at 1044.  Angle Vent 
> spitted and splashed almost continuously for the next eight hours 
> until Main Vent got sick of it and took over.
>
> 1839  River and Gold Vents off, Angle continues to splash
> 1842  Angle Vent off
> 1844  first splash in Main Vent
> 1902  River Vent on
> 1911  River Pause
> 1918  Bottom Vent begins to erupt
> 1931  River Vent on
> 1939  Gold Vent on
> 1941  Angle Vent on
> 1948  Lock
> 1956  eruption, East Vent start
>
> The start of the event cycle had us scratching our heads.  Because 
> Angle kept splashing after River and Gold turned off, we weren't sure 
> what to call it.  Tara later told me she would call it a full cycle 
> followed by a River Pause at 1911.  There was at least one splash in 
> Main Vent every minute between 1850 and 1939.  At times the splashing 
> in Main was nearly continuous, and I think everybody realized pretty 
> early during the event that an eruption was imminent.  I have seen 
> five eruptions in the last two years, and Bottom Vent was far less 
> active during this event than it was in the previous four.  Water 
> levels looked great almost from the moment each vent came on.
>
> Once again the conditions were excellent.  The sun backlit the 
> eruption, and I found Fan to be especially beautiful.  A breeze 
> removed the steam, although the boardwalk got thoroughly soaked.  
> After waiting sixteen hours, I didn't have the energy to move, so 
> Mortar got me pretty wet.
>
> Scott Grisso
> ------------------------------------------------------------------------
>
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