Peter M Powers, PhD

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December 1, 2015

The 2014 United States National Seismic Hazard Model The 2014 United States National Seismic Hazard Model

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...

Authors

Mark Petersen, Morgan Moschetti, Peter Powers, Charles Mueller, Kathleen Haller, Arthur Frankel, Yuehua Zeng, Sanaz Rezaeian, Stephen Harmsen, Oliver Boyd, Edward H. Field, Rui Chen, Kenneth Rukstales, Nico Luco, Russell Wheeler, Robert Williams, Anna Olsen

By

Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

December 1, 2015

The 2014 update to the National Seismic Hazard Model in California The 2014 update to the National Seismic Hazard Model in California

The 2014 update to the U. S. Geological Survey National Seismic Hazard Model in California introduces a new earthquake rate model and new ground motion models (GMMs) that give rise to numerous changes to seismic hazard throughout the state. The updated earthquake rate model is the third version of the Uniform California Earthquake Rupture Forecast (UCERF3), wherein the rates of all...

Authors

Peter Powers, Edward Field

By

Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

March 1, 2015

Long‐term time‐dependent probabilities for the third Uniform California Earthquake Rupture Forecast (UCERF3) Long‐term time‐dependent probabilities for the third Uniform California Earthquake Rupture Forecast (UCERF3)

The 2014 Working Group on California Earthquake Probabilities (WGCEP 2014) presents time-dependent earthquake probabilities for the third Uniform California Earthquake Rupture Forecast (UCERF3). Building on the UCERF3 time-independent model, published previously, renewal models are utilized to represent elastic-rebound-implied probabilities. A new methodology has been developed that...

Authors

Edward H. Field, Glenn Biasi, Peter Bird, Timothy Dawson, Karen Felzer, David Jackson, Kaj Johnson, Thomas Jordan, Christopher Madden, Andrew Michael, Kevin Milner, Morgan Page, Thomas Parsons, Peter Powers, Bruce E. Shaw, Wayne Thatcher, Ray Weldon, Yuehua Zeng

By

Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

August 1, 2014

Implementation of NGA-West2 ground motion models in the 2014 U.S. National Seismic Hazard Maps Implementation of NGA-West2 ground motion models in the 2014 U.S. National Seismic Hazard Maps

The U.S. National Seismic Hazard Maps (NSHMs) have been an important component of seismic design regulations in the United States for the past several decades. These maps present earthquake ground shaking intensities at specified probabilities of being exceeded over a 50-year time period. The previous version of the NSHMs was developed in 2008; during 2012 and 2013, scientists at the U.S

Authors

Sanaz Rezaeian, Mark Petersen, Morgan Moschetti, Peter Powers, Stephen C. Harmsen, Arthur Frankel

By

Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

July 17, 2014

Documentation for the 2014 update of the United States national seismic hazard maps Documentation for the 2014 update of the United States national seismic hazard maps

The national seismic hazard maps for the conterminous United States have been updated to account for new methods, models, and data that have been obtained since the 2008 maps were released (Petersen and others, 2008). The input models are improved from those implemented in 2008 by using new ground motion models that have incorporated about twice as many earthquake strong ground shaking...

Authors

Mark Petersen, Morgan Moschetti, Peter Powers, Charles Mueller, Kathleen M. Haller, Arthur Frankel, Yuehua Zeng, Sanaz Rezaeian, Stephen C. Harmsen, Oliver Boyd, Edward H. Field, Rui Chen, Kenneth Rukstales, Nico Luco, Russell Wheeler, Robert A. Williams, Anna Olsen

By

Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

June 1, 2014

The UCERF3 grand inversion: Solving for the long‐term rate of ruptures in a fault system The UCERF3 grand inversion: Solving for the long‐term rate of ruptures in a fault system

We present implementation details, testing, and results from a new inversion‐based methodology, known colloquially as the “grand inversion,” developed for the Uniform California Earthquake Rupture Forecast (UCERF3). We employ a parallel simulated annealing algorithm to solve for the long‐term rate of all ruptures that extend through the seismogenic thickness on major mapped faults in...

Authors

Morgan Page, Edward Field, Kevin Milner, Peter Powers

By

Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center

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January 16, 2024

New USGS map shows where damaging earthquakes are most likely to occur in US New USGS map shows where damaging earthquakes are most likely to occur in US

USGS scientists and our partners recently revealed the latest National Seismic Hazard Model, showing that nearly 75% of the United States could experience a damaging earthquake, emphasizing seismic hazards span a significant part of the country.

By

Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center, Geologic Hazards Science Center, Communications and Publishing

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