Publication Date:
1983-01-01
Description:
This paper proposes the maximum likelihood method to estimate the parameters of the modified Omori formula for aftershock sequences directly based on a time series of aftershocks. The likelihood function is derived by assuming that the aftershocks are distributed according to a certain non-stationary Poisson process. This method incidentally provides the asymptotic error distribution of the estimates. Statistical comparison of the characteristic parameters between two aftershock sequences, parameter estimation in case of the existence of the secondary aftershocks and other related problems are also discussed. As illustrative examples of calculations, some aftershock data are analyzed. © 1983, The Seismological Society of Japan, The Volcanological Society of Japan, The Geodetic Society of Japan. All rights reserved.
Print ISSN:
0022-3743
Electronic ISSN:
1884-2305
Topics:
Geosciences
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