NEHRP Clearinghouse

Title
Atlas of ShakeMaps for Selected Global Earthquakes. USGS ShakeMap: Niigata, Japan.
File
PB2009109240.pdf
Source
January 2008, 41 p.
Identifying Number(s)
USGS-OFR-2008-1236
Abstract
An atlas of maps of peak ground motions and intensity ShakeMaps has been developed for almost 5,000 recent and historical global earthquakes. These maps are produced using established ShakeMap methodology and constraints from macroseismic intensity data, instrumental ground motions, regional topographically-based site amplifications, and published earthquake-rupture models. Applying the ShakeMap methodology allows a consistent approach to combine point observations with ground-motion predictions to produce descriptions of peak ground motions and intensity for each event. We also calculate an estimated ground-motion uncertainty grid for each earthquake. The Atlas of ShakeMaps provides a consistent and quantitative description of the distribution and intensity of shaking for recent global earthquakes (1973-2007) as well as selected historic events. As such, the Atlas was developed specifically for calibrating global earthquake loss estimation methodologies to be used in the U.S. Geological Survey Prompt Assessment of Global Earthquakes for Response (PAGER) Project. PAGER will employ these loss models to rapidly estimate the impact of global earthquakes as part of the USGS National Earthquake Information Centers earthquake-response protocol. The development of the Atlas of ShakeMaps has also led to several key improvements to the Global ShakeMap system.
Keywords
Mapping; Niigata (Japan); Earthquakes; Ground motion estimation; Foreign countries; Quantitative shaking uncertainty calculations; Qualitative uncertainty assignments; Maps; Composite Global ShakeMap; Event selections; Atlases; ShakeMaps; Observations