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Detailed seismic intensity in Morioka area; Moriokashi ni okeru shosai shindo bunpu

Abstract

To reveal a seismic intensity distribution in individual areas, a large-scale detailed seismic intensity survey was conducted in Morioka City through questionnaire, as to the Hokkaido Toho-oki (HE) earthquake occurred on October 4, 1994 with a record of seismic intensity 4 at Morioka, and the Sanriku Haruka-oki (SH) earthquake occurred on December 28, 1994 with a record of seismic intensity 5 at Morioka. A relationship was also examined between the seismic intensity distribution and the properties of shallow basement in Morioka City. The range of seismic intensity was from 2.9 to 4.6 and the difference was 1.7 in the case of HE earthquake, and the range was from 3.1 to 5.0 and the difference was 1.9 in the case of SH earthquake. There were large differences in the seismic intensity at individual points. Morioka City has different geological structures in individual areas. There were differences in the S-wave velocity in the surface layer ranging from 150 to 600 m/sec, which were measured using a plate hammering seismic source at 76 areas in Morioka City. These properties of surface layers were in harmony with the seismic intensity distribution obtained from the questionnaire. For the observation of short frequency microtremors at about  More>>
Authors:
Saito, T; Yamamoto, H; Settai, H; [1]  Yamada, T [2] 
  1. Iwate University, Iwate (Japan). Faculty of Engineering
  2. Obayashi Road Construction Co. Ltd., Tokyo (Japan)
Publication Date:
Oct 01, 1996
Product Type:
Conference
Report Number:
CONF-9610294-
Reference Number:
SCA: 580000; PA: NEDO-96:914749; EDB-97:076090; SN: 97001782492
Resource Relation:
Conference: 95. SEGJ conference, Butsuri tansa gakkai dai 95 kai (1996 nendo shuki) gakujutsu koenkai, Kyoto (Japan), 21-23 Oct 1996; Other Information: PBD: Oct 1996; Related Information: Is Part Of Proceedings of the 95th SEGJ Conference; PB: 344 p.; Butsuri tansa gakkai dai 95 kai (1996 nendo shuki) gakujutsu koenkai koen ronbunshu
Subject:
58 GEOSCIENCES; EARTHQUAKES; GROUND MOTION; GEOLOGIC STRUCTURES; SEISMIC SOURCES; MECHANICAL VIBRATIONS; SEISMIC S WAVES; SEISMIC SURFACE WAVES; MICROEARTHQUAKES; AMPLITUDES
OSTI ID:
472643
Research Organizations:
Society of Exploration Geophysicists of Japan, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97743637; TRN: 96:914749
Availability:
Available from The Society of Exploration Geophysicists of Japan, 2-18, Nakamagome 2-chome, Ota-ku, Tokyo, Japan; OSTI as DE97743637
Submitting Site:
NEDO
Size:
pp. 100-104
Announcement Date:
Jun 03, 1997

Citation Formats

Saito, T, Yamamoto, H, Settai, H, and Yamada, T. Detailed seismic intensity in Morioka area; Moriokashi ni okeru shosai shindo bunpu. Japan: N. p., 1996. Web.
Saito, T, Yamamoto, H, Settai, H, & Yamada, T. Detailed seismic intensity in Morioka area; Moriokashi ni okeru shosai shindo bunpu. Japan.
Saito, T, Yamamoto, H, Settai, H, and Yamada, T. 1996. "Detailed seismic intensity in Morioka area; Moriokashi ni okeru shosai shindo bunpu." Japan.
@misc{etde_472643,
title = {Detailed seismic intensity in Morioka area; Moriokashi ni okeru shosai shindo bunpu}
author = {Saito, T, Yamamoto, H, Settai, H, and Yamada, T}
abstractNote = {To reveal a seismic intensity distribution in individual areas, a large-scale detailed seismic intensity survey was conducted in Morioka City through questionnaire, as to the Hokkaido Toho-oki (HE) earthquake occurred on October 4, 1994 with a record of seismic intensity 4 at Morioka, and the Sanriku Haruka-oki (SH) earthquake occurred on December 28, 1994 with a record of seismic intensity 5 at Morioka. A relationship was also examined between the seismic intensity distribution and the properties of shallow basement in Morioka City. The range of seismic intensity was from 2.9 to 4.6 and the difference was 1.7 in the case of HE earthquake, and the range was from 3.1 to 5.0 and the difference was 1.9 in the case of SH earthquake. There were large differences in the seismic intensity at individual points. Morioka City has different geological structures in individual areas. There were differences in the S-wave velocity in the surface layer ranging from 150 to 600 m/sec, which were measured using a plate hammering seismic source at 76 areas in Morioka City. These properties of surface layers were in harmony with the seismic intensity distribution obtained from the questionnaire. For the observation of short frequency microtremors at about 490 points in the city, areas with large amplitudes, mean maximum amplitudes of vertical motion components more than 0.1 mkine were distributed in north-western region and a part of southern region. 4 refs., 9 figs., 1 tab.}
place = {Japan}
year = {1996}
month = {Oct}
}