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Empirical green's function corrected for source effect
Author(s) -
Izutani Yasuo,
Katagiri Fuyuki
Publication year - 1992
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.4290210405
Subject(s) - aftershock , seismology , source model , geology , seismic moment , impulse response , strong ground motion , impulse (physics) , ground motion , function (biology) , empirical modelling , moment (physics) , source function , geodesy , mathematics , engineering , mathematical analysis , physics , fault (geology) , classical mechanics , simulation , evolutionary biology , astrophysics , computational physics , biology
One of the severe problems in the semi‐empirical method for the prediction of strong ground motions is that there is no objective criterion for choosing empirical Green's functions. It is undesirable that synthesized strong ground motions are affected by the source process of an earthquake whose record is adopted as an empirical Green's function. Through the analysis of strong motion accelerograms of two aftershocks of the 1983 Japan Sea earthquakes, it is found that characteristics of the accelerograms are dependent on the moment rate function derived from teleseismic observations. A procedure is presented for removing the effect of the source process from observed strong motion accelerograms. The thus obtained empirical Green's function expresses approximately the impulse response of the medium between the earthquake source and the observation site.