[Geysers] Long-term periodicities at Steamboat (& elsewhere)?

[David Schwarz]

   It'd be interesting to see if anything else in the basin follows a
similar periodicity, but on the other hand...

   Is there any reason to think this is anything other than a
protracted, self-limiting eruptive series, like a long-mode eruption
of Grotto or a Lion series?  It looks like it has pretty consistent
discharge from minor eruptions for three or four days, then abruptly
shuts down for a day or so.  Is any process beyond eruption/recharge
necessary to explain it?

   Semi-related, was any cycle like this observed in the 1982-1984
activity?  Was there ever a sort of window of safety after a
particularly powerful minor eruption, for instance?  I think I
remember reading that during at least one year, there were basin-wide
mini-disturbances every few days (initiated by extremely long,
powerful eruptions of Echinus) that shut it off?

David Schwarz

On Sun, Jan 2, 2011 at 6:37 PM, Davis, Brian L. <brdavis at iusb.edu> wrote:
> Looking at the Steamboat temperature log here:
>
> http://volcanoes.usgs.gov/yvo/activity/monitoring/norris/steamboat.php
>
> I noticed something I'd never known before (I know, there's a LOT I don't know) - Steamboat seems to have a nicely periodic 4.5 day cycle (most easily seen in the monthly graph). That surprised me, and got me thinking about what could do that, as well as when in the cycle a major is most likely to happen. Is there any information on this?
>
> While on the subject of long-term cycles, what others are known? I realize Giant hot periods might fit in this category, but I'm not sure what else might? Annual cycles might be related to seasonality, but certainly this doesn't explain things like a 4.5 day cycle.
>
> --
> Brian Davis
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