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Titolo:
TSUNAMI GENERATION OF THE 1993 HOKKAIDO-NANSEI-OKI EARTHQUAKE
Autore:
SATAKE K; TANIOKA Y;
Indirizzi:
UNIV MICHIGAN,DEPT GEOL SCI,1006 CC LITTLE BLDG ANN ARBOR MI 48109
Titolo Testata:
Pure and Applied Geophysics
fascicolo: 3-4, volume: 144, anno: 1995,
pagine: 803 - 821
SICI:
0033-4553(1995)144:3-4<803:TGOT1H>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
JAPAN SEA; INVERSION;
Keywords:
TSUNAMIS; 1993 HOKKAIDO NANSEI-OKI EARTHQUAKE; OKUSHIRI ISLAND;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
26
Recensione:
Indirizzi per estratti:
Citazione:
K. Satake e Y. Tanioka, "TSUNAMI GENERATION OF THE 1993 HOKKAIDO-NANSEI-OKI EARTHQUAKE", Pure and Applied Geophysics, 144(3-4), 1995, pp. 803-821

Abstract

Heterogeneous fault motion of the 1993 Hokkaido Nansei-Oki earthquakeis studied by using seismic, geodetic and tsunami data, and the tsunami generation from the fault model is examined. Seismological analysesindicate that the focal mechanism of the first 10 s, when about a third of the total moment was released, is different from the overall focal mechanism. A joint inversion of geodetic data on Okushiri Island and the tide gauge records in Japan and Korea indicates that the largestslip, about 6 m, occurred in a small area just south of the epicenter. This corresponds to the initial rupture on a fault plane dipping shallowly to the west. The slip on the northernmost subfault, which is dipping to the east, is about 2 m, while the slips on the southern subfaults, which are steeply dipping to the west, are more than 3 m. Tsunami heights around Okushiri Island are calculated from the heterogeneousfault model using different grid sizes. Computation on the smaller grids produces larger tsunami heights that are closer to the observed tsunami runup heights. Tsunami propagation in the nearly closed Japan Sea is examined as the free oscillation of the Japan Sea. The excitationof the free oscillation by this earthquake is smaller than that by the 1964 Niigata or 1983 Japan Sea earthquake.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 08:04:46