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Maximum considered earthquake geometric mean peak ground acceleration


Publication Date


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,


Maximum considered earthquake geometric mean peak ground acceleration maps (MCEG) are for assessment of the potential for liquefaction and soil strength loss, as well as for determination of lateral earth pressures in the design of basement and retaining walls. The maps are derived from the USGS seismic hazard maps in accordance with the site-specific ground-motion procedures of the NEHRP Recommended Seismic Provisions for New Building and Other Structures and the ASCE Minimum Design Loads for Buildings and Other Structures (also known as the ASCE 7 Standard; ASCE, 2016). The MCEG ground motions are taken as the lesser of probabilistic and deterministic values, as explained in the Provisions. The gridded probabilistic and deterministic [...]


Attached Files

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“Map in PNG format”
thumbnail 3.36 MB image/png
“Map in PDF format”
1.35 MB application/pdf
“Gridded design data and metadata”
3.03 MB application/zip


This map is intended to summarize the available quantitative information about seismic ground motion hazard for South America from geologic and geophysical sources.

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