Preliminary result of the ocean bottom seismographic observation at Nishinoshima volcano.
Ocean bottom seismographic observation is able to provide precious information beneath the active submarine volcano. We conducted a seismic experiment to detect seismic activity and structure of the continuously active Nishinoshima volcano since Nov. 2013. Tectonic earthquake activity was very low during the observation period of Jun. 26-Jul. 3, 2015. However, we observed characteristic seismic signals probably related to volcanic eruption activity. Fan shooting of an airgun array as a controlled seismic source suggested a high seismic attenuation area just below Nishinoshima volcano. N-type earthquake activity was detected at Nishinoshima-Minami Knoll, the small seamount to the south of Nishinoshima volcano.
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| Main Authors: | , , , , , , , |
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| Format: | Journal Contribution biblioteca |
| Language: | Japanese |
| Published: |
2016
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| Online Access: | http://hdl.handle.net/1834/15519 |
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| Summary: | Ocean bottom seismographic observation is able to provide precious information beneath the active submarine volcano. We conducted a seismic experiment to detect seismic activity and structure of the continuously active Nishinoshima volcano since Nov. 2013. Tectonic earthquake activity was very low during the observation period of Jun. 26-Jul. 3, 2015. However, we observed characteristic seismic signals probably related to volcanic eruption activity. Fan shooting of an airgun array as a controlled seismic source suggested a high seismic attenuation area just below Nishinoshima volcano. N-type earthquake activity was detected at Nishinoshima-Minami Knoll, the small seamount to the south of Nishinoshima volcano. |
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