Precise Relative Earthquake Magnitudes from Cross Correlation

Journal Article · Tue Apr 21 00:00:00 EDT 2015 · Bulletin of the Seismological Society of America

DOI:https://doi.org/10.1785/0120140329· OSTI ID:1239272

Cleveland, K. Michael ^[1]; Ammon, Charles J. ^[2]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
2. Pennsylvania State Univ., State College, PA (United States)

We present a method to estimate precise relative magnitudes using cross correlation of seismic waveforms. Our method incorporates the intercorrelation of all events in a group of earthquakes, as opposed to individual event pairings relative to a reference event. This method works well when a reliable reference event does not exist. We illustrate the method using vertical strike-slip earthquakes located in the northeast Pacific and Panama fracture zone regions. Our results are generally consistent with the Global Centroid Moment Tensor catalog, which we use to establish a baseline for the relative event sizes.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC52-06NA25396
• OSTI ID: 1239272
• Report Number(s): LA-UR-14-28088
• Journal Information: Bulletin of the Seismological Society of America, Vol. 105, Issue 3; ISSN 0037-1106
• Publisher: Seismological Society of America
• Country of Publication: United States
• Language: English

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