The 2014 United States National Seismic Hazard Model

Earthquake Spectra
By: , and 



New seismic hazard maps have been developed for the conterminous United States using the latest data, models, and methods available for assessing earthquake hazard. The hazard models incorporate new information on earthquake rupture behavior observed in recent earthquakes; fault studies that use both geologic and geodetic strain rate data; earthquake catalogs through 2012 that include new assessments of locations and magnitudes; earthquake adaptive smoothing models that more fully account for the spatial clustering of earthquakes; and 22 ground motion models, some of which consider more than double the shaking data applied previously. Alternative input models account for larger earthquakes, more complicated ruptures, and more varied ground shaking estimates than assumed in earlier models. The ground motions, for levels applied in building codes, differ from the previous version by less than ±10% over 60% of the country, but can differ by ±50% in localized areas. The models are incorporated in insurance rates, risk assessments, and as input into the U.S. building code provisions for earthquake ground shaking.

Publication type Article
Publication Subtype Journal Article
Title The 2014 United States National Seismic Hazard Model
Series title Earthquake Spectra
DOI 10.1193/120814EQS210M
Volume 31
Issue S!
Year Published 2015
Language English
Publisher EERI
Contributing office(s) Geologic Hazards Science Center
Description 30 p.
First page S1
Last page S30
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