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Earthquake Forewarning in the Cascadia Region
"This report, prepared for the National Earthquake Prediction Evaluation Council (NEPEC), is intended as a step toward improving communications about earthquake hazards between information providers and users who coordinate emergency-response activities in the Cascadia region of the Pacific Northwest. NEPEC charged a subcommittee of scientists with writing this report about forewarnings of increased probabilities of a damaging earthquake. We begin by clarifying some terminology; a 'prediction' refers to a deterministic statement that a particular future earthquake will or will not occur. In contrast to the 0- or 100-percent likelihood of a deterministic prediction, a 'forecast' describes the probability of an earthquake occurring, which may range from >0 to
Geological Survey (U.S.)
Gomberg, Joan S., 1957-; Atwater, Brian F.; Beeler, Nicholas . . .
2015
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Documentation for the 2008 Update of the United States National Seismic Hazard Maps
"The 2008 U.S. Geological Survey (USGS) National Seismic Hazard Maps display earthquake ground motions for various probability levels across the United States and are applied in seismic provisions of building codes, insurance rate structures, risk assessments, and other public policy. This update of the maps incorporates new findings on earthquake ground shaking, faults, seismicity, and geodesy. The resulting maps are derived from seismic hazard curves calculated on a grid of sites across the United States that describe the frequency of exceeding a set of ground motions. The USGS National Seismic Hazard Mapping Project developed these maps by incorporating information on potential earthquakes and associated ground shaking obtained from interaction in science and engineering workshops involving hundreds of participants, review by several science organizations and State surveys, and advice from two expert panels. The National Seismic Hazard Maps represent our assessment of the 'best available science' in earthquake hazards estimation for the United States." This document contains numerous maps and tables.
United States. Department of the Interior; Geological Survey (U.S.)
Frankel, Arthur D.; Petersen, Mark D.; Harmsen, S. C.
2008
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