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Refraction experiment in the Kobe-Hanshin area; Kobe Hanshin kan ni okeru kussetsuho tansa

Abstract

The refraction experiments were conducted to investigate the underground structures reaching the basement by analyzing the results of the artificial earthquakes the explosion earthquake research group produced in City of Kobe and the Hanshin District on December 12 to 15, 1995. Considering that noise level can exceed 1 mkine in an urban area even in the mid-night, the courses of traverse were drawn focusing on Points S2 through S4 and U1. The earthquake waves from Points S2 through S4 are generally low in amplitude. However, the major components of the signals have a dominant frequency exceeding 10Hz, which makes them distinguishable from urban noise having a lower frequency, contrary to the previous indication that such a low-amplitude wave might not be distinguishable. On the other hand, the signals from the explosion at Point 4 in Awaji Island cannot be distinguished in the urban area, even on the nearby course of traverse D. At present, the analytical group is organized to read various phases running and analyze the P-velocity structures. 2 refs., 10 figs., 1 tab.
Authors:
Koketsu, K [1] 
  1. The University of Tokyo, Tokyo (Japan). Earthquake Research Institute
Publication Date:
May 01, 1996
Product Type:
Conference
Report Number:
CONF-9605233-
Reference Number:
SCA: 580000; PA: NEDO-96:913437; EDB-96:173343; SN: 96001687043
Resource Relation:
Conference: 94. SEGJ (The Society of Exploration Geophysicists of Japan) Conference, Butsuri tansa gakkai dai 94 kai (1996 nendo shunki) gakujutsu koenkai, Tokyo (Japan), 15-17 May 1996; Other Information: PBD: May 1996; Related Information: Is Part Of Proceedings of the 94th SEGJ (The Society of Exploration Geophysicists of Japan) Conference; PB: 475 p.; Butsuri tansa gakkai dai 94 kai (1996 nendo shunki) gakujutsu koenkai koen ronbunshu
Subject:
58 GEOSCIENCES; SEISMIC SURVEYS; REFRACTION; GEOLOGIC STRUCTURES; SEISMIC NOISE; URBAN AREAS; SIGNAL-TO-NOISE RATIO; P WAVES; VELOCITY; ROCK BEDS; FREQUENCY RANGE
OSTI ID:
395473
Research Organizations:
Society of Exploration Geophysicists of Japan, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97709027; TRN: 96:913437
Availability:
Available from The Society of Exploration Geophysicists of Japan, 2-18, Nakamagome 2-chome, Ota-ku, Tokyo, Japan; OSTI as DE97709027
Submitting Site:
NEDO
Size:
pp. 32-35
Announcement Date:
Dec 02, 1996

Citation Formats

Koketsu, K. Refraction experiment in the Kobe-Hanshin area; Kobe Hanshin kan ni okeru kussetsuho tansa. Japan: N. p., 1996. Web.
Koketsu, K. Refraction experiment in the Kobe-Hanshin area; Kobe Hanshin kan ni okeru kussetsuho tansa. Japan.
Koketsu, K. 1996. "Refraction experiment in the Kobe-Hanshin area; Kobe Hanshin kan ni okeru kussetsuho tansa." Japan.
@misc{etde_395473,
title = {Refraction experiment in the Kobe-Hanshin area; Kobe Hanshin kan ni okeru kussetsuho tansa}
author = {Koketsu, K}
abstractNote = {The refraction experiments were conducted to investigate the underground structures reaching the basement by analyzing the results of the artificial earthquakes the explosion earthquake research group produced in City of Kobe and the Hanshin District on December 12 to 15, 1995. Considering that noise level can exceed 1 mkine in an urban area even in the mid-night, the courses of traverse were drawn focusing on Points S2 through S4 and U1. The earthquake waves from Points S2 through S4 are generally low in amplitude. However, the major components of the signals have a dominant frequency exceeding 10Hz, which makes them distinguishable from urban noise having a lower frequency, contrary to the previous indication that such a low-amplitude wave might not be distinguishable. On the other hand, the signals from the explosion at Point 4 in Awaji Island cannot be distinguished in the urban area, even on the nearby course of traverse D. At present, the analytical group is organized to read various phases running and analyze the P-velocity structures. 2 refs., 10 figs., 1 tab.}
place = {Japan}
year = {1996}
month = {May}
}