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人工地震を用いて推定した富士山の地下構造

Year: 2021
Type: article
Abstract: In 2003, a controlled seismic exploration was conducted around Fuji volcano, Japan. First-motion data obtained with a seismic refraction analysis reveal the following seismic structure. The first layer, with a P-wave velocity of 2.5-3.5 km/s, extends for approximately 40 km around the summit to a depth of 1-2 km. The second layer, with a velocity of 4.0-5.5 km/s, is 2-5 km thick to the west of the summit and 1-2km thick to the east, forming a dome-like shape below the summit. The third layer, with an upper surface velocity of 5.7 km/s has a dome-like shape slightly to the east of the summit; it is related to the part of the second layer that lies directly beneath the peak of the volcano and climbs upward on the east side of the volcano, corresponding to the thickness of the second layer. These structures reflect the formation of the crust within the special tectonic setting around Fuji volcano and the repeated intrusion of active magma from the deep crust.
DOI: 10.15083/0002002956
Authors: Oikawa, Jun, Tanaka, Satoru, Kagiyama, Tsuneomi, Miyamachi, Hiroki, Tsutsui, Tomoki, Ikeda, Yasushi, Katayama, Hiroaki, Matsuo, Norimichi, Oshima, Hiromitsu, Yuichi Nishimura, Yamamoto, Keigo, Watanabe, Toshiki, Yamazaki, Fumihito
Institutions: The University of Tokyo, Japan Agency for Marine-Earth Science and Technology, Tohoku University, Kyoto University, Kagoshima University, Akita University, Japan Meteorological Agency, Kyushu University, Hokkaido University, Nagoya University
Language: English
Subfield: Geology
Open Access status: green
OpenAlex ID: W7207756207
FWCI:
Cites: 3
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Related to: 10