Petersen, Mark D. Mueller, Charles S. Moschetti, Morgan P. Hoover, Susan M. Rukstales, Kenneth S. McNamara, Daniel E. Williams, Robert A. Shumway, Allison M. Powers, Peter M. Earle, Paul S. Llenos, Andrea L. Michael, Andrew J. Rubinstein, Justin L. Norbeck, Jack H. Cochran, Elizabeth S. 20180301 fixed format text files Text files and supporting metadata can be downloaded from: https://doi.org/10.5066/F7Cf9PC4 https://doi.org/10.5066/F7Cf9PC4 Petersen, Mark D. Mueller, Charles S. Moschetti, Morgan P. Hoover, Susan M. Rukstales, Kenneth S. McNamara, Daniel E. Williams, Robert A. Shumway, Allison M. Powers, Peter M. Earle, Paul S. Llenos, Andrea L. Michael, Andrew J. Rubinstein, Justin L. Norbeck, Jack H. Cochran, Elizabeth S. 20180301 publication Seismological Research Letters Volume 89, Number3. Albany, CA Seismological Society of America https://doi.org/10.1785/0220180005 A one-year seismic hazard forecast for the Central and Eastern United States, based on induced and natural earthquakes, has been produced by the U.S. Geological Survey. The model assumes that earthquake rates calculated from several different time windows will remain relatively stationary and can be used to forecast earthquake hazard and damage intensity for the year 2018. This assessment is the first step in developing an operational earthquake forecast for the CEUS, and the analysis could be revised with updated seismicity and model parameters. Consensus input models consider alternative earthquake catalog durations, smoothing parameters, maximum magnitudes, and ground motion estimates, and represent uncertainties in earthquake occurrence and diversity of opinion in the science community. Near some areas of active induced earthquakes, hazard is higher than in the 2014 USGS National Seismic Hazard Model (NSHM) by more than a factor of 3; the 2014 NSHM did not consider induced earthquakes. In some areas, previously observed induced earthquakes have stopped, so the seismic hazard reverts back to the 2014 NSHM. These data sets represent the hazard curves for a grid of points with a spacing of 0.05 degrees in latitude and longitude. It represents the annual rate of exceedance versus peak horizontal acceleration or horizontal spectral response acceleration for 0.2- or 1.0-second periods. These hazard curves are based on the full seismicity catalog and a b-value 0f 1.5. These datasets are intended to provide the annual rate of exceedance for a given ground motion, or conversely, to find the ground motion for a given annual rate of exceedance. 20180101 20181231 publication date Complete None planned -125.0 -65.0 50.0 24.6 none Seismic Earthquake Hazard Induced Natural USGS Metadata Identifier USGS:5aaebc6ae4b081f61ab0d369 http://geonames.usgs.gov/ Alabama Arizona Arkansas California Colorado Connecticut Delaware District of Columbia Florida Georgia Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming USA United States none 2018 None The data are not to be used for areas outside the conterminous United States. Acknowledgment of the U.S. Geological Survey, National Seismic Hazard Mapping Project would be appreciated in products derived from these data. Ken Rukstales U.S. Geological Survey - Geologic Hazards Science Center mailing address

Box 25046, MS 966

Denver CO 80225 USA 303-273-8677 rukstales@usgs.gov Microsoft Windows 7 Esri ArcGIS 10.3 These data sets are based on a seismological model. The following report provides information on quality assessment for the data set: Petersen, M.D., Mueller, C.S., Moschetti, M.P., Hoover, S.M., Rukstales, K.S., McNamara, D.E., Williams, R.A., Shumway, A.M., Powers, P.M., Earle, P.S., Llenos, A.L., Michael, A.J., Rubinstein, J.L., Norbeck, J.H., and Cochran, E.S., 2018, 2018 One-Year Seismic Hazard Forecast for the Central and Eastern United States from Induced and Natural Earthquakes: Seismological Research Letters, Volume 89, Number3. Data have not been resampled. Ground motion values (x-axis of each curve) are the same for all of the curves. Logarithmic(log-log) interpolation should be used when extracting values from the hazard curve. The hazard curves are truncated for annual rates of exceedance less than 0.0001. Data outside the physical boundaries of the United States have been included, although they should not be used. The location of features is based on calculations of a seismological model for the study area. The location of each point is considered to be correct within the confines of computer accuracy. Based upon the 1-year seismic hazard model for 2018, and the full seismicity catalog, a suite of hazard curves were calculated for an equally spaced grid of points covering the conterminous United States. The grid has a cell spacing of 0.05 degrees in both latitude and longitude. 2018 Vector Point 611309 0.05 0.05 Decimal degrees D_WGS_1984 World Geodetic System 1984 6378137 298.257223563 HazCurves_1YrModel_FullCat.zip Zipped archive of 2018 hazard curve data for annual rate of exceedance versus peak horizontal acceleration or horizontal spectral response acceleration for 0.2- or 1.0-second periods, using the full seismicity catalog and a b-value of 1.5 USGS This zipped archive contains three data files that contain hazard curves for a set of gridded points. All the hazard curves in each file share the same set of intensity measure levels or ground motion levels (x-values). The first three lines are header lines. The final field of line 2 contains the spectral period in seconds. The period convention for PGA is to present results as 0.0 s period. The last field of line 3 indicates the number of ground motion levels for the given period. The following lines (with 1 value per line) contain the x-values (intensity measure levels) for all the curves in the file, in units of g. Subsequent lines contain hazard values for a single geographic point. The first two values specify the latitude and longitude (respectively) for the curve while subsequent values (on that same line) contain mean annual frequencies of exceedance ordered corresponding to the x-values at the top of the file. none U.S. Geological Survey - ScienceBase mailing address

Denver Federal Center, Building 810, Mail Stop 302

Lakewood CO 80215 USA 1-888-275-8747 sciencebase@usgs.gov Downloadable fixed format data file in ASCII text format. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner whenever applicable. The data have been approved for release and publication by the U.S. Geological Survey (USGS). Although the data have been subjected to rigorous review and are substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, the data are released on the condition that neither the USGS nor the U.S. Government may be held liable for any damages resulting from authorized or unauthorized use. Although the data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Users of the data are advised to read all metadata and associated documentation thoroughly to understand appropriate use and data limitations. compressed zip archive Windows 7.0 fixed format text file 2018 hazard curve data for annual rate of exceedance versus peak horizontal acceleration or horizontal spectral response acceleration for 0.2- or 1.0-second periods, using the full seismicity catalog and a b-value of 1.5 Files need to be decompressed using winzip or similar utility 64.2 https://doi.org/10.5066/F7Cf9PC4 none 20200818 U.S. Geological Survey - Geologic Hazards Science Center Ken Rukstales mailing address

Box 25046, MS 966

Lakewood CO 80225 USA 303-273-8677 ghsc_metadata@usgs.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time