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Titolo:
URGENT JOINT OBSERVATION OF AFTERSHOCKS OF THE 1995 HYOGO-KEN-NANBU EARTHQUAKE
Autore:
HIRATA N; OHMI S; SAKAI S; KATSUMATA K; MATSUMOTO S; TAKANAMI T; YAMAMOTO A; IIDAKA T; URABE T; SEKINE M; OOIDA T; YAMAZAKI F; KATAO H; UMEDA Y; NAKAMURA M; SETO N; MATSUSHIMA T; SHIMIZU H; TAKAHASHI H; KOSUGA M; WATANABE M; KAWAKAMI T; OKU Y; TSUMURA K; SASAKI K; TOGASHI H; HASEMI A; NISHIMURA T; NIDA K; NAKAHARA H; ITO S; YOSHIMOTO K; SHIOMI K; OKADA T; AOKI S; TSUMURA N; WATANABE K; ROCCO GF; ITO A; HAGIWARA H; OGINO I; HASHIMOTO S; SAKAI K; KOBAYASHI M; HANEDA T; MIURA R; MIURA K; TSUKADA S; UEHIRA K; YOSHIHARA T; OKUDA T; SHICHI R; NAKAMURA M; FUJII N; YAMADA M; WATANABE H; ITO K; NISHIGAMI K; SHIBUTANI T; ONOUE K; KOIZUMI M; MATSUO S; MATSUMURA K; WADA H; FUJITA Y; HIRAMATSU Y; NAKAMURA M; HORIKAWA H; NAKAMURA Y; NEGISHI H; YAMAZAKI A; BESANA G; MARUYAMA S; FUJIWARA Y; OBANA K; OHIGASHI A; MOTOKI A; HIRATA M; SHIMADA Y; NEMOTO H; YAMAOKA M; YAMADA A; KASE Y; TANIGUCHI K; KIMURA S; UMAKOSHI K; UCHIDA K; HIRANO S;
Indirizzi:
UNIV TOKYO,EARTHQUAKE RES INST,BUNKYO KU,7-3-1 HONGO TOKYO 113 JAPAN KYOTO UNIV,DISASTER PREVENT RES INST UJI 611 JAPAN HOKKAIDO UNIV,FAC SCI,KITA KU SAPPORO HOKKAIDO 060 JAPAN TOHOKU UNIV,FAC SCI,AOBA KU SENDAI MIYAGI 980 JAPAN NAGOYA UNIV,SCH SCI,CHIKUSA KU NAGOYA AICHI 46401 JAPAN KYUSHU UNIV,FAC SCI,HIGASHI KU FUKUOKA 812 JAPAN
Titolo Testata:
Journal of Physics of the Earth
fascicolo: 4, volume: 44, anno: 1996,
pagine: 317 - 328
SICI:
0022-3743(1996)44:4<317:UJOOAO>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
MODEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
21
Recensione:
Indirizzi per estratti:
Citazione:
N. Hirata et al., "URGENT JOINT OBSERVATION OF AFTERSHOCKS OF THE 1995 HYOGO-KEN-NANBU EARTHQUAKE", Journal of Physics of the Earth, 44(4), 1996, pp. 317-328

Abstract

A disastrous earthquake with a magnitude of 7.2 hit the southern partof Hyogo Prefecture on January 17, 1995. The mainshock was located onan active fault of the Arima-Takatsuki-Rokko fault system. Its focal mechanism was consistent with a right-lateral strike-slip fault trending N40 degrees E. Three days after the occurrence of the mainshock, westarted to install a highly dense seismic array in and around the fault area of the quake. Two permanent regional seismic networks of more than 30 stations covered the entire area of 200 km x 200 km. The temporarily installed array of 27 stations spanned the fault area of 15 km x 50 km. All data were telemetered to a temporary observation center at Uji. We located about 3,100 aftershocks in real time for 1 month using an internet connection between seismic networks. The aftershock area extended 70 km trending northeast to southwest. Hypocenters determined by the network were delivered automatically through the Internet. We found that the aftershock distribution was heterogeneous in space and time: seven clusters of hypocenters were identified and temporary variation in the rate of occurrence of aftershocks had a periodic component with periods of a half of day, 1 day, and 3 days, that are superimposed on decaying of the rate following Omori's law.

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Documento generato il 18/01/20 alle ore 12:59:45