[Geysers] FW: Earthquake swarm - Question

[Carlton Cross]

From: Goh83642 at wmconnect.com [mailto:Goh83642 at wmconnect.com]
Sent: Monday, January 19, 2009 11:00 PM
To: geysers-bounces at lists.wallawalla.edu
Subject: Earthquake swarm - Question

Gazers,

  I have a question about the recent earthquake swarm in the north end of Yellowstone lake.  My question isn't so much about the swarm as it is about a relative analogy of how much an earthquake intensity is.  In other words, if an earthquake has a magitude of 1.0, how can I compare that to something I can see on a real time example: such as: dropping an 18 wheeler tractor from 100 feet will cause an equivalent of a 1.0 magitude earthquake.
  Since there were hundreds of earthquakes in magitudes of 1.0 - 3.9 in the swarm, it would sure help to visualize how much shaking it really did to the surface of the earth.
  If there are any specialists on earthquakes out there, please give this request some thought and let us all know the answer.

  Regards,  Gary Henderson
                 Meridian, Idaho
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