Journal
GEOPHYSICAL JOURNAL INTERNATIONAL
Volume 174, Issue 3, Pages 849-856Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-246X.2008.03864.x
Keywords
time series analysis; probability distributions; seismicity and tectonics; computational seismology; statistical seismology
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We investigated the detection capability of global earthquakes immediately after the occurrence of a large earthquake. We stacked global earthquake sequences after occurrences of large earthquakes obtained from the Harvard centroid-moment tensor catalogue, and applied a statistical model that represents an observed magnitude-frequency distribution of earthquakes to the stacked sequence. The temporal variation in model parameters, which corresponds to the detection capability of earthquakes, was estimated using a Bayesian approach. We found that the detection capability of global earthquakes is lower than normal for several hours after the occurrence of large earthquakes; for instance, the duration of lowered detection capability of global earthquakes after the occurrence of an earthquake with a magnitude of seven or larger is estimated to be approximately 12 hr.
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