Joshua Tree National Park Geology Seismograph network in the Joshua Tree region Click on image to view see more stations. Map from TRINET A network of active faults cut across the Southern California and the Mojave desert region. In order to pinpoint earthquakes, government agencies and universities have established seismographs across the region. See seismogram of Hector Mine earthquake Legend for map at right.

| U.S. Geological Survey Pasadena Office of Earthquake Information | | Joshua Tree earthquake home | Joshua Tree National Park home |

| USGS Geology in the Parks home | NPS Park Geology Tour home | This site is a cooperative endeavor of the US Geological Survey Western Region Earth Surface Processes Team and the National Park Service. Please share your comments and suggestions with us! parkgeology@den.nps.gov http://www.nature.nps.gov/grd/usgsnps/jotr/seisgr.html This page was last updated on 10/19/99