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Seismograms show the amplitude of shear energy (Lg) is larger for an earthquake than for an explosion. Scientists at Pacific Northwest National Laboratory are using compressional (represented by Pg) and shear wave data from seismic events to build statistical models that will ultimately help distinguish earthquakes from explosions.

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Document Title: Seismology and Explosions
Category: Security: Local-National-International
Media Type: Graphics
Date of Image/Photo: Spring 2005
Background:
URL of this page: http://picturethis.pnl.gov/picturet.nsf/by+id/AMER-6B5QMV

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