Hawthorne, JC orcid.org/0000-0002-4117-2082, Ampuero, JP and Simons, M (2017) A Method for Calibration of the Local Magnitude Scale Based on Relative Spectral Amplitudes, and Application to the San Juan Bautista, California, Area. Bulletin of the Seismological Society of America, 107 (1). pp. 85-96. ISSN 0037-1106
Abstract
We develop and use a spectral empirical Green’s function approach to estimate the relative source amplitudes of earthquakes near San Juan Bautista, California. We isolate the source amplitudes from path effects by comparing the recorded spectra of pairs of events with similar location and focal mechanism, without computing the path effect. With this method, we estimate the relative moments of 1600 M 1.5–4 local earthquakes, and we use these moments to recalibrate the duration magnitude scale in this region. The estimated moments of these small earthquakes increase with catalog magnitude MD roughly proportionally to 101.1MD, slightly more slowly than a moment‐magnitude scaling of 101.5Mw. This more accurate magnitude scaling can be used in analyses of the local earthquakes, such as comparisons between the seismic moments and geodetic observations.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 by the Seismological Society of America. Reproduced in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst of Geophysics and Tectonics (IGT) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 20 Mar 2017 12:28 |
Last Modified: | 20 Dec 2017 01:38 |
Published Version: | https://doi.org/10.1785/0120160141 |
Status: | Published |
Publisher: | Seismological Society of America |
Identification Number: | 10.1785/0120160141 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:113759 |