Petersen, Mark D. Harmsen, Stephen C. Jaiswal, Kishor S. Rukstales, Kenneth S. Luco, Nicolas Haller, Kathleen M. Mueller, Charles S. Shumway, Allison M. 2018 GEOTIFF Text files and supporting metadata can be downloaded from: https://doi.org/10.5066/F7WM1BK1 https://doi.org/10.5066/F7WM1BK1 Petersen, Mark D. Harmsen, Stephen C. Jaiswal, Kishor S. Rukstales, Kenneth S. Luco, Nicolas Haller, Kathleen M. Mueller, Charles S. Shumway, Allison M. 20180116 publication Bulletin of the Seismological Society of America doi: 10.1785/0120170002 Albany, CA Seismological Society of America https://doi.org/10.1785/0120170002 A comparison of the 2017 USGS South America seismic hazard model and the Global Seismic Hazard Assessment Program (GSHAP) model was made to see how the models differ. The comparison was made as the ratio of PGA at 10% probability of exceedance in 50 years. This dataset is intended to provide comparison of the 2017 USGS South America seismic hazard model and the Global Seismic Hazard Assessment Program (GSHAP) model. 1999 2017 publication date Complete None planned -85.05 -34.75 12.55 -55.85 none Seismic Earthquake Hazard Risk USGS Metadata Identifier USGS:59bc478ee4b091459a59138e http://geonames.usgs.gov/ Argentina Bolivia Brazil Chile Colombia Ecuador French Guiana Guyana Panama Paraguay Peru Suriname Trinidad and Tobago Uruguay Venezuela South America None 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 Giardini, G. Grunthal, G. Shedlock, K.M. Zhang, P. 1999 publication Annali di Geofisica v. 42, p. 1225-1228 This data set is based on a seismological model. The following report provides information on quality assessment for the data set: Petersen, M.D., Harmsen, S.C., Jaiswal, K.S., Rukstales, K.S., Luco, Nicolas, Haller, K.M., Mueller, C.S., and Shumway, A.M., 2018, Seismic Hazard, Risk, and Design for South America: Bulletin of the Seismological Society of America, doi: 10.1785/012017/002 Data have not been resampled. Data outside the physical boundaries of the South America, Panama, and Trinidad and Tobago have been assigned a NoData value. 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 2017 USGS seismic hazard model for South America and the Global Seismic Hazard Assessment Program (GSHAP) model, a comparison was made of the ratio of peak ground acceleration at 10% probability of exceedance in 50 years for the 2017 USGS model values divided by the GSHAP model values. The input and output grids have a cell spacing of 0.1 degrees in both latitude and longitude. 2017 Raster Pixel 684 503 0.1 0.1 Decimal degrees D_WGS_1984 World Geodetic System 1984 6378137 298.257223563 SApga10PctIn50Yrs_2017overGSHAP.tif Ratio of peak ground acceleration with a 10% probability of exceedance in 50 years for the 2017 USGS South America seismic hazard model divided by the peak ground acceleration with a 10% probability of exceedance in 50 years for the 1999 GSHAP model USGS Each pixel contains a value of the ratio of peak ground acceleration with a 10% probability of exceedance in 50 years for the 2017 USGS South America seismic hazard model divided by the peak ground acceleration with a 10% probability of exceedance in 50 years for the 1999 GSHAP model. 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 raster data set in tiff 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. TIFF 42 TIFF image with world file Comparison with the 2010 USGS South America seismic hazard model Files need to be decompressed using winzip or similar utility 1.4 https://doi.org/10.5066/F7WM1BK1 none 20260424 U.S. Geological Survey - Geologic Hazards Science Center GHSC Data Steward mailing address

Box 25046, MS 966

Lakewood CO 80225 USA 303-273-8500 ghsc_metadata@usgs.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time