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タイトル: | DEEP SUBSURFACE STRUCTURE ESTIMATED BY MICROTREMORS ARRAY OBSERVATIONS AND GRAVITY SURVEYS IN KASHIWAZAKI AREA, JAPAN |
著者: | GOTO, HIROYUKI https://orcid.org/0000-0002-4397-154X (unconfirmed) TAKAHASHI, CHIKA ISHII, YAYOI LING, SU-QUN MIYAKOSHI, KEN MORIKAWA, HITOSHI SATO, YOSHIKI SAWADA, SUMIO https://orcid.org/0000-0002-5759-4394 (unconfirmed) SHINGAKI, YOSHIKAZU SUZUKI, YUTO TAKABATAKE, DAISUKE JOSHIMA, MASATO |
著者名の別形: | 後藤, 浩之 |
キーワード: | (2007 Niigataken Chuetsu-oki Earthquake) earthquake geophysical exploration (gravity survey) microtremor seismic response |
発行日: | Aug-2009 |
出版者: | 社団法人地盤工学会 |
誌名: | Soil and foundation |
巻: | 49 |
号: | 4 |
開始ページ: | 651 |
終了ページ: | 659 |
抄録: | Kashiwazaki City and Kariwa Village, located in the north central part of Japan, were the major areas damaged during the 2007 Niigataken Chuetsu-oki Earthquake (M_w 6.6). Ground motion records for the area indicate the effects of a deep subsurface structure. Microtremor array observations were performed at three sites and gravity surveys at 120 sites in the Kashiwazaki area. The gravity basement estimated from the gravity surveys exists at a depth of about 1000m around Kariwa Village Hall, and becomes shallow in the southwestern direction around Kashiwazaki City Hall. The gravity basement is compared with the results estimated by the microtremor array observations and validated at two sites, namely, KST and KVH (Kariwa Village Hall). The peak period of the calculated response spectra at Kashiwazaki Village Hall corresponds to the peak period of the observed H/V spectra during the main shock. |
著作権等: | 地盤工学会 The Japanese Geotechnical Society 本文データは学協会の許諾に基づきCiNiiから複製したものである |
URI: | http://hdl.handle.net/2433/131753 |
DOI(出版社版): | 10.3208/sandf.49.651 |
出現コレクション: | 学術雑誌掲載論文等 |
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