[Geysers] Re: Marathon Pool.

[JANET JOHNS]

Yes, it would be fair to say it usually indicates a marathon (depending on your definition of marathon--certainly not a five or six hour eruption).  Once again, I do not have the data to back that up either.  So I'm just talking.  What I do remember is getting some low marathon pools at very odd times in a Grotto cycle (thus the fooler photos).  But who (including myself) wants to spend the summer watching marathon pool?  We started a Spa, marathon study in 1998, but ran into a "downloading the probe problem", so we gave that up.  Do I think everything is connected?  Yep.

Jan

----- Original Message ----- 
  From: Eric Hatfield 
  To: geyser observation reports 
  Sent: Saturday, May 07, 2005 3:08 PM
  Subject: [Geysers] Re: Marathon Pool.


  OK.  But the next question is:  Does it USUALLY indicate a marathon?  I think this might be a safe statement.  And the quantitative phraseology would be: What percentage of the time is X pool level predictive?  Any guesses?  50% would indicate essentially no correlation, given that marathons are as frequent as they are.

  JANET JOHNS <janet.johns5 at verizon.net> wrote: 
    Dear Scott,

    Yep.   We've seen this more than once during our summers of watching Grotto.  Marathon Pool is not a good indicator as far as we are concerned.  We've seen it very low and know by probe that a marathon did not occur.  As a matter of fact, at some point we made a slide show of marathon pool and asked people which slide indicated a marathon, which people could not tell from the slides thus indicating that the level of the pool does not indicate a marathon, but people think it does.  

    We have stated this repeatedly to various people but sigh, we are ignored.....unfortunately we did not keep records of marathon pool.  A study of marathon pool and spa is definitely a good idea...


    Janet Johns (with Lew as always)
      ----- Original Message ----- 
      From: TSBryan at aol.com 
      To: geysers at wwc.edu 
      Sent: Wednesday, May 04, 2005 8:04 PM
      Subject: [Geysers] Geyser report May 4


      This report will mainly be the tale of odd stuff around Grotto and Giant. Briefly first:

      Castle was at 0408e, then 1411 with a full major. That's just 10h 03m Was the 0408 a minor of some kind. Although minors have been common of late, that apparently was not. I have pulled the complete record from April 21 and will report sometime later.

      Grand at 0703e and 1440 (T2Q), interval of 7h 37m.
      Beehive at 0940 following yesterday's 1503, so the interval was 18h 37m. Today's Indicator was 10 minutespreceeded and accompanied by the C-C Indicator that reached 2 to 4 feet high.

      Now today -- when I rode the bike downbasin I found Grotto in eruption. Daisy was ie at 0811 (steam cloud from Fan and Mortar). Then, back at Grotto, Oblong's steam cloud told me it was i.e. at 0815. I walked down there to catch some of it, then on the way back took a good look at Giant's platform. Dry. Very dry. And Bijou was off. Because of Oblong, I hadn't really paid attention to the Grotto group, but now about the moment I saw that Variable Spring was down about 3 inches, I realized that Rocket was starting a major. Duration about 4 1/2 minutes (a bit short). Well, says I, maybe not a marathon. But then I went to look at Marathon Pool. Down 6 inches and bubbling vigorously. Well, says I, maybe early in a marathon.

      Now to me, all that says that Grotto had a marathon, perhaps a short mini-marathon (formerly known as a 10-K) type. Well, anyhow, seeing this I left the area because I'd seen Beehive splashing heavily at 0800. So to the Hill. At about 0900, Tara Cross joined me and said she thought Grotto was off. At 1000 we confirmed that it was off. Oh, so maybe not a marathon -- to me, anyway, Variable and Marathon had not dropped enough. 

      And then she and I went out to Fountain (ie; it had started at 1006). And we returned to the UGB. After fooling around a bit, having lunch and going to the VC, back down the basin just after noon.

      Bijou was jetting, not real vigorously but decidedly there. The Giant platform was bone dry -- there had not been a hot period. Water level in the GIP was _WAY_ down. Variable is full and overflowing. Grotto is grumbling loudly, but there isn't a trace of visible water in Indicator or the Grotto Fountains. And look! Marathon Pool is down at least as far as I've _ever_ seen it. Way down and bubbling, easily 2 feet lower than it had been about 0830.

      After very gradually slowing down, at 1240 Bijou shut off. It still had not come on again when I finally departed near 1600.

      And hey, at 1333 Rocket is splashing. That ended. At 1405 (a few minutes after Tara left to head back to Walla Walla) Rocket is splashing again, enough to spill water onto the surrounding platform and this time I can see water violently sloshing inside Grotto's keyhole openings. And there's not a trace of water in the Fountains, none visible in Indicator. And Bijou is still off.

      In summary: Marathon, the Fountains and Indicator, and the Giant Group acted as if there had been a marathon. But Grotto, Rocket and Variable did not agree. Throughout _all_ of this, Spa was low and quiet.

      Does this fit any previous scenario?

      Scott Bryan, who will be back to the UGB early tomorrow.


--------------------------------------------------------------------------


      _______________________________________________
      Geysers mailing list
      Geysers at wwc.edu
      https://mailman.wwc.edu/mailman/listinfo/geysers

    _______________________________________________
    Geysers mailing list
    Geysers at wwc.edu
    https://mailman.wwc.edu/mailman/listinfo/geysers



------------------------------------------------------------------------------


  _______________________________________________
  Geysers mailing list
  Geysers at wwc.edu
  https://mailman.wwc.edu/mailman/listinfo/geysers
-------------- next part --------------
An HTML attachment was scrubbed...
URL: </geyser-list/attachments/20050507/b0821f9b/attachment.html>