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2014 United States (Lower 48) Seismic Hazard Long-term Model

Completed
By Earthquake Hazards Program December 23, 2019

Seismicity catalogs, GIS shapefiles, gridded seismic hazard curve data, gridded ground motion data, and mapped gridded ground motion values are available for the 2014 National Seismic Hazard Model for the Conterminous U.S.

2014 U.S. Seismic Hazard Map
Sources/Usage: Public Domain. View Media Details
2014 U.S. seismic hazard map showing the earthquake peak ground acceleration (PGA) that has a 2% chance of being exceeded in 50 years. Red indicates the highest hazard, and gray indicates the lowest hazard. (Public domain.)

Probabilistic seismic hazard data and maps of the conterminous U.S. for peak ground acceleration (PGA) and 0.2 and 1.0 second spectral acceleration at probability levels of 2 percent in 50 years (annual probability of 0.000404) and 10 percent in 50 years (annual probability of 0.0021), assuming firm rock soil conditions at 760 m/s, are available. Hazard was calculated on a 0.05 degree by 0.05 degree grid, defined by a bounding box encompassing the conterminous U.S. (-125 to -65 degrees longitude west, 24.6 to 50 degrees latitude north). Development of the 2014 National Seismic Hazard Model for the Conterminous U.S. is documented in the USGS Open-File Report 2014-1091.

This dataset is considered a legacy dataset. The original dataset was uploaded to the USGS website at the time of publication of the seismic hazard model (2014) but was later moved over the the USGS ScienceBase Catalog (2019). The original dataset was assumed to be complete and accurate, but may contain inconsistencies when compared to more recent, actively maintained datasets.

NOTE: In 2018, additional period and site class maps were calculated for the 2014 NSHM. For additional period and site class maps and data, please see https://doi.org/10.5066/P9I6BPX5, documented in USGS Open-File Report 2018-1111.

Additional Information

Seismic-hazard maps for the conterminous United States, 2014

The maps presented here provide an update to the 2008 data contained in U.S Geological Survey Scientific Investigations Map 3195 (http://pubs.usgs.gov/sim/3195/).Probabilistic seismic-hazard maps were prepared for the conterminous United States for 2014 portraying peak horizontal acceleration and horizontal spectral response acceleration for 0.2- and 1.0-second periods with probabilities of exceed
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Below are multimedia items associated with this project.

No results found.

Below are publications associated with this project.

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 data and by
Authors
Mark D. Petersen, Morgan P. Moschetti, Peter M. Powers, Charles S. Mueller, Kathleen M. Haller, Arthur D. Frankel, Yuehua Zeng, Sanaz Rezaeian, Stephen C. Harmsen, Oliver S. Boyd, Edward H. Field, Rui Chen, Kenneth S. Rukstales, Nico Luco, Russell L. Wheeler, Robert A. Williams, Anna H. Olsen
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Additional period and site class maps for the 2014 National Seismic Hazard Model for the conterminous United States

The 2014 update of the U.S. Geological Survey (USGS) National Seismic Hazard Model (NSHM) for the conterminous United States (2014 NSHM; Petersen and others, 2014, 2015) included probabilistic ground motion maps for 2 percent and 10 percent probabilities of exceedance in 50 years, derived from seismic hazard curves for peak ground acceleration (PGA) and 0.2 and 1.0 second spectral accelerations (S
Authors
Allison Shumway, Mark D. Petersen, Peter M. Powers, Sanaz Rezaeian
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Geodesy- and geology-based slip-rate models for the Western United States (excluding California) national seismic hazard maps

The 2014 National Seismic Hazard Maps for the conterminous United States incorporate additional uncertainty in fault slip-rate parameter that controls the earthquake-activity rates than was applied in previous versions of the hazard maps. This additional uncertainty is accounted for by new geodesy- and geology-based slip-rate models for the Western United States. Models that were considered includ
Authors
Mark D. Petersen, Yuehua Zeng, Kathleen M. Haller, Robert McCaffrey, William C. Hammond, Peter Bird, Morgan Moschetti, Zhengkang Shen, Jayne Bormann, Wayne Thatcher
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Uniform California earthquake rupture forecast, version 3 (UCERF3): the time-independent model

In this report we present the time-independent component of the Uniform California Earthquake Rupture Forecast, Version 3 (UCERF3), which provides authoritative estimates of the magnitude, location, and time-averaged frequency of potentially damaging earthquakes in California. The primary achievements have been to relax fault segmentation assumptions and to include multifault ruptures, both limita
Authors
Ned Field, Glenn P. Biasi, Peter Bird, Timothy E. Dawson, Karen R. Felzer, David D. Jackson, Kaj M. Johnson, Thomas H. Jordan, Christopher Madden, Andrew J. Michael, Kevin R. Milner, Morgan T. Page, Thomas Parsons, Peter M. Powers, Bruce E. Shaw, Wayne R. Thatcher, Ray J. Weldon, Yuehua Zeng
By
Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center

Seismicity catalogs, GIS shapefiles, gridded seismic hazard curve data, gridded ground motion data, and mapped gridded ground motion values are available for the 2014 National Seismic Hazard Model for the Conterminous U.S.

2014 U.S. Seismic Hazard Map
Sources/Usage: Public Domain. View Media Details
2014 U.S. seismic hazard map showing the earthquake peak ground acceleration (PGA) that has a 2% chance of being exceeded in 50 years. Red indicates the highest hazard, and gray indicates the lowest hazard. (Public domain.)

Probabilistic seismic hazard data and maps of the conterminous U.S. for peak ground acceleration (PGA) and 0.2 and 1.0 second spectral acceleration at probability levels of 2 percent in 50 years (annual probability of 0.000404) and 10 percent in 50 years (annual probability of 0.0021), assuming firm rock soil conditions at 760 m/s, are available. Hazard was calculated on a 0.05 degree by 0.05 degree grid, defined by a bounding box encompassing the conterminous U.S. (-125 to -65 degrees longitude west, 24.6 to 50 degrees latitude north). Development of the 2014 National Seismic Hazard Model for the Conterminous U.S. is documented in the USGS Open-File Report 2014-1091.

This dataset is considered a legacy dataset. The original dataset was uploaded to the USGS website at the time of publication of the seismic hazard model (2014) but was later moved over the the USGS ScienceBase Catalog (2019). The original dataset was assumed to be complete and accurate, but may contain inconsistencies when compared to more recent, actively maintained datasets.

NOTE: In 2018, additional period and site class maps were calculated for the 2014 NSHM. For additional period and site class maps and data, please see https://doi.org/10.5066/P9I6BPX5, documented in USGS Open-File Report 2018-1111.

Additional Information

Seismic-hazard maps for the conterminous United States, 2014

The maps presented here provide an update to the 2008 data contained in U.S Geological Survey Scientific Investigations Map 3195 (http://pubs.usgs.gov/sim/3195/).Probabilistic seismic-hazard maps were prepared for the conterminous United States for 2014 portraying peak horizontal acceleration and horizontal spectral response acceleration for 0.2- and 1.0-second periods with probabilities of exceed
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Below are multimedia items associated with this project.

No results found.

Below are publications associated with this project.

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 data and by
Authors
Mark D. Petersen, Morgan P. Moschetti, Peter M. Powers, Charles S. Mueller, Kathleen M. Haller, Arthur D. Frankel, Yuehua Zeng, Sanaz Rezaeian, Stephen C. Harmsen, Oliver S. Boyd, Edward H. Field, Rui Chen, Kenneth S. Rukstales, Nico Luco, Russell L. Wheeler, Robert A. Williams, Anna H. Olsen
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Additional period and site class maps for the 2014 National Seismic Hazard Model for the conterminous United States

The 2014 update of the U.S. Geological Survey (USGS) National Seismic Hazard Model (NSHM) for the conterminous United States (2014 NSHM; Petersen and others, 2014, 2015) included probabilistic ground motion maps for 2 percent and 10 percent probabilities of exceedance in 50 years, derived from seismic hazard curves for peak ground acceleration (PGA) and 0.2 and 1.0 second spectral accelerations (S
Authors
Allison Shumway, Mark D. Petersen, Peter M. Powers, Sanaz Rezaeian
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Geodesy- and geology-based slip-rate models for the Western United States (excluding California) national seismic hazard maps

The 2014 National Seismic Hazard Maps for the conterminous United States incorporate additional uncertainty in fault slip-rate parameter that controls the earthquake-activity rates than was applied in previous versions of the hazard maps. This additional uncertainty is accounted for by new geodesy- and geology-based slip-rate models for the Western United States. Models that were considered includ
Authors
Mark D. Petersen, Yuehua Zeng, Kathleen M. Haller, Robert McCaffrey, William C. Hammond, Peter Bird, Morgan Moschetti, Zhengkang Shen, Jayne Bormann, Wayne Thatcher
By
Natural Hazards Mission Area, Earthquake Hazards Program, Geologic Hazards Science Center

Uniform California earthquake rupture forecast, version 3 (UCERF3): the time-independent model

In this report we present the time-independent component of the Uniform California Earthquake Rupture Forecast, Version 3 (UCERF3), which provides authoritative estimates of the magnitude, location, and time-averaged frequency of potentially damaging earthquakes in California. The primary achievements have been to relax fault segmentation assumptions and to include multifault ruptures, both limita
Authors
Ned Field, Glenn P. Biasi, Peter Bird, Timothy E. Dawson, Karen R. Felzer, David D. Jackson, Kaj M. Johnson, Thomas H. Jordan, Christopher Madden, Andrew J. Michael, Kevin R. Milner, Morgan T. Page, Thomas Parsons, Peter M. Powers, Bruce E. Shaw, Wayne R. Thatcher, Ray J. Weldon, Yuehua Zeng
By
Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center
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