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 Digital geospatial data 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 seismic hazard model for South America, based on a smoothed (gridded) seismicity model, a subduction model, a crustal fault model, and a ground motion model, has been produced by the U.S. Geological Survey. These models are combined to account for ground shaking from earthquakes on known faults as well as earthquakes on un-modeled faults. This data set represents the results of calculations of hazard curves for a grid of points with a spacing of 0.1 degrees in latitude and longitude. It represents Modified Mercalli Intensity (MMI) with a 10% probability of exceedance in 50 year. The maps and data were derived from PGA ground-motion conversions of Worden et al. (2012), and include soil amplification based on a topographic proxy of Allen and Wald (2009), and site amplification based on Seyhan and Stewart (2014) relationships. This map is intended to provide an estimate of Modified Mercalli Intensity (MMI) with a 10% probability of exceedance in 50 years. 2017 publication date Complete None planned -85.05 -19.95 15.05 -70.05 none Seismic Earthquake Hazard Risk USGS Metadata Identifier USGS:59c9840ee4b017cf313f1146 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 2017 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 Allen, T.I. Wald, D.J. 2009 publication Bulletin of the Seismological Society of America v. 99, p. 935-943 Seyhan, E. Stewart, J.P. 2014 publication Earthquake Spectra v. 30, 1241-1256, doi:10.1193/063013EQS181M Worden, C.B. Gerstenberger, M.C. Rhoades, D.A. Wald, D.J. 2012 publication Bulletin of the Seismological Society of America v. 102, p. 204-221 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: 10.1785/0120170002 Data have not been resampled. All values are within the permissible range of the Modified Mercalli Intensity scale. Data outside the physical boundaries of South America and the study area 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, a suite of hazard curves were calculated for an equally spaced grid of points covering the South America. The grid has a cell spacing of 0.1 degrees in both latitude and longitude. Using log-log interpolation, the hazard curves at each grid point were used to determine the peak ground accelerations that have an annual frequency of exceedance of 0.0021 (475 year return period) for each grid point. Using the topographic-based soil classification methods of Wald and Allen (2009), the calculated ground motions were amplified for soil type based on the amplification factors of Stewart and Seyhan (2014). Finally, the amplified ground motions for peak ground acceleration were converted to Modified Mercalli Intensities using the the relationships of Worden and others (2012). 2017 Raster Pixel 851 651 0.1 0.1 Decimal degrees D_WGS_1984 World Geodetic System 1984 6378137 298.257223563 SA_10PctIn50Yrs_MMI_Soils.tif Modified Mercalli Intensity based on peak ground acceleration, with 10% probability of exceedance in 50 years USGS Each pixel contains a decimal Modified Mercalli Intensity value that has a 10% probability of exceedance in fifty year. For display purposes, the pixel values should be classified as follows: Decimal MMI range MMI classification ------------------------------ -------------------------- 1.0 - 3.5 <= III 3.5 - 4.5 IV 4.5 - 5.5 V 5.5 - 6.5 VI 6.5 - 7.5 VII 7.5 - 8.5 VIII > 8.5 >= IX http://pubs.usgs.gov/gip/earthq4/severitygip.html 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 raster 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 Modified Mercalli Intensity based on peak ground acceleration, with 10% probability of exceedance in 50 years Files need to be decompressed using winzip or similar utility 0.5 https://doi.org/10.5066/F7Wm1BK1 none 20260424 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