2) Probabilistic seismic hazard maps and data for South America
For peak ground acceleration, spectral accelerations at 0.2-second and 1.0-second periods, and Modified Mercalli Intensity for 2%, 10%, and 50% probability of exceedance in 50 years
Dates
Publication Date
2018-08-10
Citation
Petersen, M.D., Harmsen, S.C., Jaiswal, K.S., Rukstales, K.S., Luco, N., Haller, K.M., Mueller, C.S., and Shumway, A.M., 2018, Seismic Hazard, Risk, and Design for South America: U.S. Geological Survey data release, https://doi.org/10.5066/F7Wm1BK1.
Summary
Seismic hazard curves were determined using the USGS seismic hazard model for South America. The curves represent the annual rate of exceedance versus peak horizontal acceleration or horizontal spectral response acceleration for 0.2- or 1.0-second periods, for a grid of points with a spacing of 0.1 degrees in latitude and longitude. The hazard curves were used to prepare maps and gridded data that portray peak horizontal acceleration and horizontal spectral response acceleration for 0.2- and 1.0-second periods with a 2%, 10%, and 50% probability of exceedance in 50 years, and a uniform site condition (Vs30) of 760 m/sec. MMI maps for 2%, 10%, and 50% probability of exceedance in 50 years were derived from PGA ground-motion conversions [...]
Summary
Seismic hazard curves were determined using the USGS seismic hazard model for South America. The curves represent the annual rate of exceedance versus peak horizontal acceleration or horizontal spectral response acceleration for 0.2- or 1.0-second periods, for a grid of points with a spacing of 0.1 degrees in latitude and longitude. The hazard curves were used to prepare maps and gridded data that portray peak horizontal acceleration and horizontal spectral response acceleration for 0.2- and 1.0-second periods with a 2%, 10%, and 50% probability of exceedance in 50 years, and a uniform site condition (Vs30) of 760 m/sec. MMI maps for 2%, 10%, and 50% probability of exceedance in 50 years were derived from PGA ground-motion conversions of Worden et al. (2012). These maps include soil amplification based on a topographic proxy of Allen and Wald (2009), and site amplification based on Seyhan and Stewart (2014) relationships.
Allen, T.A. and Wald, D.J. 2009,. On the use of high-resolution topographic data as a proxy for seismic site conditions (VS30), Bulletin of the Seismological Society of America 99, 935-943.
Seyhan E. and Stewart, P.S. 2014, Semi-empirical nonlinear site amplification from NGA-West2 data and simulations, Earthquake Spectra 30, 1241-1256, doi:10.1193/063013EQS181M.
Worden, C. B., Gerstenberger, M.C., Rhoades, D.A. and Wald, D.J. 2012, Probabilistic relationships between ground-motion parameters and modified Mercalli intensity in California, Bulletin of the Seismological Society of America 102, 204-221.
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Related External Resources
Type: Related Primary Publication
Petersen, M.D., Harmsen, S.C., Jaiswal, K.S., Rukstales, K.S., Luco, N., 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, Volume 108, Number 2, p. 781–800.
