[Geysers] Seismograms

[Karen Low]

Well, I definitely felt the earthquake at 6:04 pm!  Perhaps I'll head out in the basin after doing ski drops in the morning, to see if anything seems to be obviously reacting.

Earthquakes rock my world!

Karen Low

--- On Sun, 1/17/10, Michael Goldberg <goldbeml at ucmail.uc.edu> wrote:

From: Michael Goldberg <goldbeml at ucmail.uc.edu>
Subject: [Geysers] Seismograms
To: geysers at lists.wallawalla.edu
Date: Sunday, January 17, 2010, 6:03 PM

There was a small earthquake swarm this afternoon centered about 10 miles northwest of Old Faithful, with three events (so far) having magnitude between 2.5 and 2.7.  I've attached a copy of the current Old Faithful seismogram.

For comparison purposes I also attached a couple of seismograms of recent Giantess eruptions:

The July 6 eruption starts at 6:13 MST.  The large signal at 6:02 MST is from a distant 6.1 earthquake.

The October 14 eruption starts at 3:48 MST.  There are a handful of local earthquakes, like the one at 6:02 MST.  I would guess that the long duration signals at midday and late afternoon are weather-related noise.

If Giantess erupts during a rainstorm, I don't think we'd ever be able to tell from the seismic record.

Michael Goldberg
Michael.Goldberg at uc.edu
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