Spatial Extent of Data

USGS Data Source

Earthquake Hazards Program

USGS Thesaurus Keywords

standards, earthquakes, engineering sciences, seismology, hazards

Other Subject Keywords

Risk, Seismic, NEHRP 2009, 2010 ASCE/SEI 7

Place Keywords

South Dakota, Colorado, Michigan, Montana, North Carolina, Washington, Mississippi, Iowa, Virginia, Maine, Florida, Nebraska, District of Columbia, New Hampshire, Illinois, Oklahoma, Wisconsin, USA, Utah, Oregon, Hawaii, New Jersey, Pennsylvania, Vermont, Georgia, Maryland, Ohio, Texas, Minnesota, Delaware, Rhode Island, Tennessee, Nevada, Missouri, Arizona, Arkansas, United States, Louisiana, North Dakota, Massachusetts, New Mexico, South Carolina, Kentucky, Wyoming, West Virginia, Alabama, Alaska, Indiana, Idaho, California, New York, Connecticut, Kansas

Long-period transition period, TL, for the conterminous United States, Alaska, Hawaii, Puerto Rico and United States Virgin Islands, 2009 NEHRP.

For designing buildings and other structures to safely resist earthquakes, the 2009 NEHRP Recommended Seismic Provisions and the 2010 ASCE/SEI 7 Standard contain maps of long-period transition periods, TL. TL is based on the modal moment magnitude obtained from the disaggregation of a 2% probability of exceedance in 50 years hazard analysis for spectral acceleration at 2-second period for the conterminous United States and Alaska, and 1-second period for Hawaii. For the U.S. territories of Puerto Rico, U.S. Virgin Islands, Guam, Northern Mariana Islands, and American Samoa, the long-period transition, TL, is 12 seconds and no maps or shapefiles are provided in this data release.

Get Data and Metadata

Author(s)	Nicole M Pember, Katrina S Peralta, Stephen E Waldvogel, Nicolas Luco , Ken S. Rukstales , Stephen C. Harmsen
Publication Date	2024-06-25
Beginning Date of Data	2009
Ending Date of Data	Unknown
Data Contact	Nicolas Luco
DOI	https://doi.org/10.5066/P1UTDSDT
Citation	Pember, N.M., Peralta, K.S., Waldvogel, S.E., Luco, N., Rukstales, K.S., and Harmsen, S.C., 2024, Long-period transition period, TL, for the conterminous United States, Alaska, Hawaii, Puerto Rico and United States Virgin Islands, 2009 NEHRP.: U.S. Geological Survey data release, https://doi.org/10.5066/P1UTDSDT.
Metadata Contact	Nicole W. Pember
Metadata Date	2024-06-25
Related Publication	There was no related primary publication associated with this data release.
Citations of these data	Loading https://sp360.asce.org/PersonifyEbusiness/Merchandise/Product-Details/productId/232961952 Loading https://www.fema.gov/sites/default/files/documents/femap_750_nehrp_recommended_seismic_provisions_new_buildings_other_structures_2009_edition.zip
Access	public
License	http://www.usa.gov/publicdomain/label/1.0/

Harvest Source: ScienceBase
Harvest Date: 2024-07-24T04:01:55.917Z