Image of earthquake seismograms from the USGS (Pasadena). Used in article Seismogram. Original upload to English Wikipedia: http://en.wikipedia.org/wiki/Image:Usgs_quake_seis.png

20:44, 21 October 2004 (UTC) . . GeoGreg (Talk | contribs) . . 761×926 (10,211 bytes) (Image of earthquake seismograms from USGS)

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