Estimation of Moment Magnitude from Ground Motions at Regional Distances

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• journal_title：Bulletin of the Seismological Society of America
• Contributor：Gail M. Atkinson ; Alireza Babaie Mahani
• Publisher：Seismological Society of America
• Date：2013-02-01
• Format：text/html
• Language：en
• Identifier：10.1785/0120120182
• journal_abbrev：Bulletin of the Seismological Society of America
• issn：0037-1106
• volume：103
• issue：1
• firstpage：107
• section：Articles

摘要

<p id="p-1">We present a simple and robust approach to estimate moment magnitude (M) for events of M<6 from regional seismographic observations (vertical component), recorded in the distance range from 100 to 400 km. M can be estimated from 1‐Hz response spectral amplitudes for events in North America with an uncertainty (standard deviation of residuals) of <0.2 units in most regions, using the simple relationships provided herein. Advantages of the method are that it allows for consistent estimation of M across regions, and that it provides relationships that are consistent with the predictions of a stochastic point‐source model for typical regional attenuation models. p><p id="p-2">m>Online Material: m>Table of events for which the moment magnitude was estimated. p>