PSN-L Email List Message

Subject: Alaska's swarm
From: tchannel1@............
Date: Thu, 7 Aug 2008 17:40:54 -0600


Hi All,  I have a friend, who has a friend in Alaska, he =
writes......below........He sent me a screenshot of his helicorder, I =
have no way to post it here but just email me directly and I will send =
it to you..It is massive...........I counted 248 events at hour 22:00 =
today.

Thanks, Ted


here's a helicorder image (PNG format) of the swarm from an 3C short =
period instrument=20
on Great Sitkin island, 30 miles from Kasatochi

M



  it is crazy around here now. let me send you a screenshot of the =
earthquake swarm=20
  here in a second.=20

  in the last hour continuous tremor has begun to accompany the =
earthquakes, so=20
  this may become volcanic instead of just tectonic. the volcano =
(Kasatochi) is not well known and has=20
  no seismic instruments. the closest seismometers are about 30 miles =
away.

  however, the tremor is strong enough to be seen there.

  the swarm to the best of my knowledge is not a typical =
mainshock-aftershock=20
  sequence. so this means it may be a result of an intrusion.

  M=20









Hi All,  I have a friend, who = has a=20 friend in Alaska, he writes......below........He sent me a screenshot of = his=20 helicorder, I have no way to post it here but just email me directly and = I will=20 send it to you..It is massive...........I counted 248 events at hour = 22:00=20 today.
 
Thanks, Ted
 
 
here's a helicorder image (PNG format) of the swarm from an 3C = short period=20 instrument
on Great Sitkin island, 30 miles from = Kasatochi

M

 
it is crazy around here now. let me send you a screenshot of the=20 earthquake swarm
here in a second.
 
in the last hour continuous tremor has begun to accompany the=20 earthquakes, so
this may become volcanic instead of just tectonic. the volcano=20 (Kasatochi) is not well known and has
no seismic instruments. the closest seismometers are about 30 = miles=20 away.
 
however, the tremor is strong enough to be seen there.
 
the swarm to the best of my knowledge is not a typical=20 mainshock-aftershock
sequence. so this means it may be a result of an intrusion.
 
 


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