PSN-L Email List Message

Subject: Re: 8 second Microseisms
From: ian ian@...........
Date: Thu, 30 May 2002 12:51:17 -1000


no hurricane here in Hawaii, a bright sunny day in fact.

What it may be is the volcano causing what you see on the Kipapa station.  I know there has been a bit of extra activity lately, described as long period small quakes.  Another station here which is also showing activity is the Poha station, ..  The volcano's daily status can be checked at  One key phrase from today's bulletin is "Kilauea is really jumping".

My own geophone seismometer isn't showing anything untoward - - but my experimantal tiltmeter is picking up similar traces to those seen at Kipapa and Pahoa stations.

Could be interesting...

Ian Smith

Mark Robinson wrote:
FYI,,   I noticed a strangeness in the background noise today as I was
checking my
traces, so I did an FFT and discovered that they had a period of about 8
seconds,, as compared to the n ormal 4.5 to 5.5 that I've noticed over
the years
for Northern California!    Anyone have any idea why????    Could this be
by the hurricane,, or is something else going on???   I verified that it
was not
my machine by checking with the Berkeley "make your own seismogram" link!! html

I haven't noticed such long period microseisms before,,, perhaps I just

PSN Station #55
near Pilot Hill Ca
38.828N 120.979W

Hurricane huh, must be hitting Hawaii pretty hard, have a quick look at LISS ismic_Data/telemetry_data/KIP_24hr.html before
it expires or at a cached version at


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