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Joshua Tree National Park geology: on shaky ground [ More info] Description of earthquake that was felt in Joshua Tree region (1999) and links to earthquake summary, shaded relief map, aerial photos of the rupture zone, shaking intensity maps, damage reports, and seismograph network map.
ShakeMap [ More info] ShakeMap sites provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.
USGS and the Southern California Integrated GPS Network (SCIGN) [ More info] Field Office involved in operating GPS stations, data recording, and supplying of earthquake data. Links to GPS data analysis, photos, and technical information.
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