| Autor: |
Jun Oikawa, Satoru Tanaka, Tsuneomi Kagiyama, Hiroki Miyamachi, Tomoki Tsutsui, Yasushi Ikeda, Hiroaki Katayama, Norimichi Matsuo, Hiromitsu Oshima, Yuichi Nishimura, Keigo Yamamoto, Toshiki Watanabe, Fumihito Yamazaki |
| Předmět: |
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| Zdroj: |
Bulletin of the Earthquake Research Institute, University of Tokyo / Tokyo Daigaku Jishin Kenkyūjo Ihō; 2021, Vol. 96 Issue 1/2, p1-10, 10p |
| Abstrakt: |
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 Pwave velocity of 2.5-3.5 km/s, extends for approximately 40km 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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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