Methods of Mmax Estimation East of the Rocky Mountains
Open-File Report
2009-1018
Prepared with funding from the U.S. Nuclear Regulatory Commission
By: Russell L. Wheeler
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Abstract
Several methods have been used to estimate the magnitude of the largest possible earthquake (Mmax) in parts of the Central and Eastern United States and adjacent Canada (CEUSAC). Each method has pros and cons. The largest observed earthquake in a specified area provides an unarguable lower bound on Mmax in the area. Beyond that, all methods are undermined by the enigmatic nature of geologic controls on the propagation of large CEUSAC ruptures. Short historical-seismicity records decrease the defensibility of several methods that are based on characteristics of small areas in most of CEUSAC. Methods that use global tectonic analogs of CEUSAC encounter uncertainties in understanding what 'analog' means. Five of the methods produce results that are inconsistent with paleoseismic findings from CEUSAC seismic zones or individual active faults.
Suggested Citation
Wheeler, R.L., 2009, Methods of Mmax Estimation East of the Rocky Mountains: U.S. Geological Survey Open-File Report 2009-1018, iv, 44 p., https://doi.org/10.3133/ofr20091018.
ISSN: 2331-1258 (online)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Methods of Mmax Estimation East of the Rocky Mountains |
| Series title | Open-File Report |
| Series number | 2009-1018 |
| DOI | 10.3133/ofr20091018 |
| Year Published | 2009 |
| Language | ENGLISH |
| Publisher | U.S. Geological Survey |
| Contributing office(s) | U.S. Geological Survey |
| Description | iv, 44 p. |
| Online Only (Y/N) | Y |