Data Release for Additional Period and Site Class Data for the 2018 National Seismic Hazard Model for the Conterminous United States (ver. 1.2, May 2021)

Dates

Publication Date: 2019-10-07
Time Period: 2018
Revision: 2020-02-18
Revision: 2021-05-28

Citation

Shumway, A.M., Clayton, B.S., and Rukstales, K.S., 2021, Data Release for Additional Period and Site Class Data for the 2018 National Seismic Hazard Model for the Conterminous United States (ver. 1.2, May 2021): U.S. Geological Survey data release, https://doi.org/10.5066/P9RQMREV.

Summary

The updated 2018 National Seismic Hazard Model includes new ground motion models, aleatory uncertainty, and soil amplification factors for the central and eastern U.S. and incorporates basin depths from local seismic velocity models in four western U.S. (WUS) urban areas. These additions allow us, for the first time, to calculate probabilistic seismic hazard curves for an expanded set of spectral periods (0.01 s to 10 s) and site classes (VS30 = 150 m/s to 1,500 m/s) for the conterminous U.S. (CONUS), as well as account for amplification of long-period ground motions in deep sedimentary basins in the Los Angeles, San Francisco Bay, Salt Lake City, and Seattle regions. Ground motion data for 2, 5, and 10 percent probability of exceedance [...]

Summary

The updated 2018 National Seismic Hazard Model includes new ground motion models, aleatory uncertainty, and soil amplification factors for the central and eastern U.S. and incorporates basin depths from local seismic velocity models in four western U.S. (WUS) urban areas. These additions allow us, for the first time, to calculate probabilistic seismic hazard curves for an expanded set of spectral periods (0.01 s to 10 s) and site classes (VS30 = 150 m/s to 1,500 m/s) for the conterminous U.S. (CONUS), as well as account for amplification of long-period ground motions in deep sedimentary basins in the Los Angeles, San Francisco Bay, Salt Lake City, and Seattle regions. Ground motion data for 2, 5, and 10 percent probability of exceedance in 50 years have been derived from these hazard curves. Two sets of data are available: (1) 0.05 by 0.05 degree gridded hazard data for the CONUS and (2) 0.01 by 0.01 degree gridded hazard data for WUS basins. Note that both sets of data contain basin amplification in deep sedimentary basins in the WUS. The 0.01 degree by 0.01 degree data simply provides a higher resolution dataset than then 0.05 degree by 0.05 degree dataset.

This dataset is discussed in the journal article titled: "The 2018 update of the US National Seismic Hazard Model: Additional period and site class data" by Shumway et al. (2021) located at https://doi.org/10.1177/8755293020970979.

Version 1.2: We now include FULL and TRUNCATED hazard curves in this data set. While the FULL gridded hazard curve data include ground motions at long return periods, the USGS cautions users using values below 10^-4 (10,000 years). These seismic hazard models were developed for building codes concerned with return periods of 10^-4 and above. Design values were calculated from the TRUNCATED hazard curves, therefore, we have provided these hazard curves here as well as the FULL hazard curves. We recommend users use the TRUNCATED hazard data sets.

First Posted - October 7, 2019
Revised - February 18, 2020 (ver 1.1)
Revised - May 28, 2021 (ver 1.2)

Contacts

Point of Contact :: Allison M Shumway, Earthquake Hazards Program
Originator :: Allison M Shumway, Brandon S Clayton, Kenneth S Rukstales
Metadata Contact :: Geologic Hazards Science Center
Publisher :: U.S. Geological Survey
USGS Mission Area :: Natural Hazards
SDC Data Owner :: Earthquake Hazards Program
Distributor :: U.S. Geological Survey - ScienceBase

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Data_Release_for_Additional_Period_and_Site_Class_Data_for_the_2018_NSHM_for_CONUS_Version_1.2.xml “Metadata file.” Original FGDC Metadata	View	11.1 KB	application/fgdc+xml
Version_1.2.txt “Plain text file describing changes made in this and past revisions.”		3.23 KB	text/plain
READ_ME_Version_1.2.txt “Plain text file describing the dataset.”		12.89 KB	text/plain
“FULL Gridded hazard data for the conterminous U.S. (Vs30 = 1500 m/s)”		1.1 GB	application/zip
“FULL Gridded hazard data for the conterminous U.S. (Vs30 = 1080 m/s)”		1.1 GB	application/zip
“FULL Gridded hazard data for the conterminous U.S. (Vs30 = 760 m/s)”		1.1 GB	application/zip
“FULL Gridded hazard data for the conterminous U.S. (Vs30 = 530 m/s)”		1.1 GB	application/zip
“FULL Gridded hazard data for the conterminous U.S. (Vs30 = 365 m/s)”		1.1 GB	application/zip
“FULL Gridded hazard data for the conterminous U.S. (Vs30 = 260 m/s)”		1.1 GB	application/zip
“FULL Gridded hazard data for the conterminous U.S. (Vs30 = 185 m/s)”		1.1 GB	application/zip
“FULL Gridded hazard data for the conterminous U.S. (Vs30 = 150 m/s)”		1.1 GB	application/zip
0p05_degree_CONUS_2018_nshm_AB_vs30_1500_data_TRUNCATED.zip “TRUNCATED Gridded hazard data for the conterminous U.S. (Vs30 = 1500 m/s)”		562.97 MB	application/zip
0p05_degree_CONUS_2018_nshm_B_vs30_1080_data_TRUNCATED.zip “TRUNCATED Gridded hazard data for the conterminous U.S. (Vs30 = 1080 m/s)”		568.13 MB	application/zip
0p05_degree_CONUS_2018_nshm_BC_vs30_760_data_TRUNCATED.zip “TRUNCATED Gridded hazard data for the conterminous U.S. (Vs30 = 760 m/s)”		579.12 MB	application/zip
0p05_degree_CONUS_2018_nshm_C_vs30_530_data_TRUNCATED.zip “TRUNCATED Gridded hazard data for the conterminous U.S. (Vs30 = 530 m/s)”		597.95 MB	application/zip
0p05_degree_CONUS_2018_nshm_CD_vs30_365_data_TRUNCATED.zip “TRUNCATED Gridded hazard data for the conterminous U.S. (Vs30 = 365 m/s)”		615.6 MB	application/zip
0p05_degree_CONUS_2018_nshm_D_vs30_260_data_TRUNCATED.zip “TRUNCATED Gridded hazard data for the conterminous U.S. (Vs30 = 260 m/s)”		624.21 MB	application/zip
0p05_degree_CONUS_2018_nshm_DE_vs30_185_data_TRUNCATED.zip “TRUNCATED Gridded hazard data for the conterminous U.S. (Vs30 = 185 m/s)”		626.02 MB	application/zip
0p05_degree_CONUS_2018_nshm_E_vs30_150_data_TRUNCATED.zip “TRUNCATED Gridded hazard data for the conterminous U.S. (Vs30 = 150 m/s)”		626.71 MB	application/zip
“FULL Gridded hazard data for the WUS basins (all site classes)”		1.31 GB	application/zip
0p01_degree_WUS_basins_2018_nshm_all_site_classes_data_TRUNCATED.zip “TRUNCATED Gridded hazard data for the WUS basins (all site classes)”		952.5 MB	application/zip

Related External Resources

Type: Related Primary Publication

Shumway, A.M., Petersen, M.D., Powers, P.M., Rezaeian, S., Rukstales, K.S., and Clayton, B.S., 2021, The 2018 update of the US National Seismic Hazard Model: Additional Period and Site Class Data: Earthquake Spectra, 37(2): 1145-1161, https://doi.org/10.1177/8755293020970979.	https://doi.org/10.1177/8755293020970979
Petersen, M.D., Shumway, A.M., Powers, P.M., Mueller, C.S., Moschetti, M.P., Frankel, A.D., Rezaeian, S., McNamara, D.E., Luco, N., Boyd, O.S., Rukstales, K.S., Jaiswal, K.S., Thompson, E.M., Hoover, S.M., and others, 2019, The 2018 update of the US National Seismic Hazard Model: Overview of model and implications: Earthquake Spectra, v. 36, no. 1, p. 5–41, https://doi.org/10.1177/8755293019878199.	https://doi.org/10.1177/8755293019878199

Purpose

To provide additional period and site class seismic hazard data for the 2018 National Seismic Hazard Model.

Data Release for Additional Period and Site Class Data for the 2018 National Seismic Hazard Model for the Conterminous United States (ver. 1.2, May 2021)

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