Seismic Refraction Survey around Bandai Volcano by Using a Marine Airgun
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- HASEGAWA Akira
- Faculty of Science, Tohoku University
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- HORIUCHI Shigeki
- Faculty of Science, Tohoku University
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- UEKI Sadato
- Faculty of Science, Tohoku University
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- NISHIZAWA Azusa
- Faculty of Science, Tohoku University
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- MATSUZAWA Toru
- Faculty of Science, Tohoku University
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- UMINO Norihito
- Faculty of Science, Tohoku University
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- HORI Shuichiro
- Faculty of Science, Tohoku University
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- INAMORI Takao
- Faculty of Science, Tohoku University
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- MATSUMOTO Satoshi
- Faculty of Science, Tohoku University
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- HAMAGUCHI Hiroyuki
- Faculty of Science, Tohoku University
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- TAKAGI Akio
- Faculty of Science, Tohoku University
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- TANAKA Kazuo
- Faculty of Science, Hirosaki University
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- SUZUKI Masayuki
- Faculty of Education, Utsunomiya University
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- SUYEHIRO Kiyoshi
- Faculty of Science, Chiba University
Bibliographic Information
- Other Title
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- エアガンによる磐梯山周辺域の地殻構造探査
- エアガン ニ ヨル バンダイサン シュウヘンイキ ノ チカク コウゾウ タンサ
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Abstract
A seismic refraction experment was carried out around the Bandai volcanic area, the southern part of the Tohoku District, by using a large capacity (9 liter air chamber) marine airgun. Shallow crustal structure (down to about a 4km depth) obtained along the 30km-length profile shows the swelling of the second layer with P-wave velocity more than about 4.0km/s just beneath Bandai volcano in parallel to the surface topography. The swelling of the second layer by about 1km is in good agreement with that of the basement estimated from the Bouguer anomaly.<br>Seismic signals from the surrounding telemetered stations of Tohoku University at epicentral distances from 10km to 230km, are continuously recorded during the airgun experiments. In the stacked records we can detect the clear first P arrivals from the airgun shots at the stations with distances ranging up to 150km, which shows the usefullness of the marine airgun for studying the crustal structure on land. Anomalously late P arrivals or unclear P arrivals are observed for the ray paths which cross active volcanoes. This result and the shallow crustal structure obtained along the refraction profile suggest the existence of the anomalous zone beneath Bandai volcano at depths deeper than about 4km.
Journal
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- Zisin (Journal of the Seismological Society of Japan. 2nd ser.)
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Zisin (Journal of the Seismological Society of Japan. 2nd ser.) 42 (2), 161-169, 1989
SEISMOLOGICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390001204305370368
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- NII Article ID
- 130006787368
- 40001526502
- 10004183132
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- NII Book ID
- AN00305741
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- ISSN
- 18839029
- 2186599X
- 00371114
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- HANDLE
- 10097/50907
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- NDL BIB ID
- 3242515
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- Data Source
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- JaLC
- IRDB
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed