Science Fair Project Encyclopedia
Harmonic tremor
Harmonic tremor describes a continuous rhythmic earthquakes in the Earth's upper lithosphere that can be detected by a seismograph and is often preceded or accompanied by a volcanic eruptions.
Harmonic tremor is a continuous release of seismic energy typically associated with the underground movement of magma. It contrasts distinctly with the sudden release and rapid decrease of seismic energy associated with the more common type of earthquake caused by slippage along a fault.
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details