[Geysers] Grotto Fountain is active

[Lynn Stephens]

The lack of grotto marathons also explains the lack of Grotto Fountains.  "Historically" the farther away from a Grotto marathon a Grotto eruption is, the less likely it is that Grotto Fountain will precede the Grotto eruption.  Thus, fewer Grotto marathons also equals fewer Grotto Fountain eruptions.
 
Lynn Stephens



Date: Thu, 7 Aug 2008 15:33:59 -0500From: david.schwarz at gmail.comTo: geysers at lists.wallawalla.eduSubject: Re: [Geysers] Grotto Fountain is active
   I just took a quick look at the Grotto data that Ralph uploaded.  It may be a coincidence, but Grotto seems to have had no real long-mode eruptions between July 6 and August 3, and only one eruption in that period that was substantially longer than the usual short-mode duration.  That's a pretty striking change--literally one marathon in the last month--and it overlaps with the period during which Grotto Fountain wasn't observed.   Looking at the year-to-date data, it looks like there's an ongoing major decrease in the frequency of marathons, especially intermediate-length marathons, that started shortly before Giant went dormant.David
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