Seismic Waves: ShakeMap and ShakeCast   [open pdf - 565KB]

Seismic Waves is a newsletter published by the National Earthquake Hazards Reduction Program (NEHRP). "In the immediate aftermath of a damaging earthquake, lives and property may hang in the balance as emergency personnel assess and respond to the disaster. The ShakeMap and ShakeCast systems can tell responders where they are most likely to be needed, and tell them quickly--within minutes of an earthquake. ShakeMap and ShakeCast (short for ShakeMap Broadcast) are complementary software systems developed by the United States Geological Survey (USGS), one of the agencies participating in NEHRP. ShakeMap originated in the late 1990s and expanded as a key product of the Advanced National Seismic System (ANSS), the nationwide network of monitoring stations that detect, measure, and record seismic events. ShakeMap systems receive and process ANSS data in regions of high seismic activity. When a moderate to large earthquake occurs, ShakeMap automatically generates maps and data files that document various measures of ground shaking. The most popular of these products is the instrumental intensity ShakeMap, which uses color coding to depict the severity of earthquake shaking. USGS and its regional seismic network partners now operate ShakeMap systems in Alaska, Southern California, Northern California, Nevada, the Pacific Northwest, and Utah."

Public Domain
Retrieved From:
National Earthquake Hazards Reduction Program: http://www.nehrp.gov
Media Type:
Seismic Waves (July 2007)
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