The Pacific plate is moving northwest, scraping horizontally past North America at a rate of about 50 millimeters (2 inches) per year. 31, pp. Imperial has had: (M1.5 or greater) 1 earthquake in the past 24 hours 19 earthquakes in the past 7 days; 82 earthquakes in the past 30 days; 2,093 earthquakes in the past 365 days (Tcnrarivc projection of San Andreas fault zone? Generalized fault map of the southern part of the Salton Trough. The fault presently disappears beneath the alluvium of the Imperial Valley, but is thought to continue southeastward into the Gulf, merging into the East Pacific Rise along the Gulf's axis. Am., vol. by California Div. Maphill is more than just a map gallery. About two-thirds of this movement occurs on the San Andreas fault and some parallel faults- -- the San Jacinto, Elsinore, and Imperial faults (see map). Ulrich, Franklin P., 1941, The Imperial Valley earthquake of 1940: Bull. The general structure of the Gulf is very well observed in this satellite composite photo. 2305 Figure 1. A large part of the region’s population lives within 50 miles of the San Andreas fault and could be exposed to very strong levels of ground shaking in a … graphic base map.) Get free map for your website. Soc. The San Andreas fault is the primary feature of the system and the longest fault in California that can cause powerful earthquakes—as big as magnitude 8. The past swarms have remained active for 1 … This page shows the location of San Andreas Fault, California 95459, USA on a detailed satellite map. The area was equipped with an array of strong motion seismographs for analyzing the fault mechanisms of nearby earthquakes and seismic characteristics of the sediments in the valley. This area, along with the Brawley Seismic Zone just to the south in the Imperial Valley, is prone to earthquake swarms. component of the dynamic fault-basin system, and a natural record, not always easy to read, of the tectonic processes that produced them. From space, the San Andreas Fault and its attending landforms are beautifully revealed. Ages of the deposits have been determined from studies of Discover the beauty hidden in the maps. Choose from several map styles. 20: Map showing damage caused by the earthquake of May 18, 1940, to the canal system in the Imperial Valley, 13-31, Fig. There have been about three significant swarms in the past 20 years (2001, 2009, and 2016). Farther west lies the San Diego and Imperial County border. The Imperial Valley (Spanish: Valle de Imperial or Valle Imperial) lies in the California counties of Imperial and Riverside in southeastern Southern California with an urban area centered on the city of El Centro.The Valley is bordered by the Colorado River to the east and, in part, the Salton Sea to the west. The Neogene (Miocene to Pleistocene) stratigraphy of the western Salton Trough and Imperial Valley is illustrated in Figures 3 and 4. Seism. Mines and Geology, 1962.) Interactive Map of the San Andreas Fault Zoom and pan as you please! Recent and Long-Term Behavior of the Brawley Fault Zone, Imperial Valley, California: An Escalation in Slip Rate? The Imperial Valley is surrounded by a number of interconnected fault systems and is vulnerable to both moderate and strong earthquakes as well as earthquake swarms. 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