Continuous seismic monitoring of Nishinoshima volcano, Izu-Ogasawara, by using long-term ocean bottom seismometers
Abstract Nishinoshima in Izu-Ogasawara started erupting in November 2013, and the island size increased. Continuous monitoring is important for study of the formation process. Since it is difficult to make continuous observations on a remote uninhabited island, we started seismic observations near N...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2017-11-01
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| Series: | Earth, Planets and Space |
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| Online Access: | http://link.springer.com/article/10.1186/s40623-017-0747-7 |
| _version_ | 1818506536676229120 |
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| author | Masanao Shinohara Mie Ichihara Shin’ichi Sakai Tomoaki Yamada Minoru Takeo Hiroko Sugioka Yutaka Nagaoka Akimichi Takagi Taisei Morishita Tomozo Ono Azusa Nishizawa |
| author_facet | Masanao Shinohara Mie Ichihara Shin’ichi Sakai Tomoaki Yamada Minoru Takeo Hiroko Sugioka Yutaka Nagaoka Akimichi Takagi Taisei Morishita Tomozo Ono Azusa Nishizawa |
| author_sort | Masanao Shinohara |
| collection | DOAJ |
| description | Abstract Nishinoshima in Izu-Ogasawara started erupting in November 2013, and the island size increased. Continuous monitoring is important for study of the formation process. Since it is difficult to make continuous observations on a remote uninhabited island, we started seismic observations near Nishinoshima using ocean bottom seismometers (OBSs) from February 2015. Our OBSs have a recording period of 1 year, and recovery and re-deployment of OBSs were repeated to make continuous observations. The OBSs were deployed with distances of less than 13 km from the crater. Events with particular characteristics were frequently recorded during the eruption period and are estimated to correlate with the release of plumes from the crater by comparison with temporal on-site records using a video camera and microphones. We estimated the number of events using the amplitude average of records to monitor volcanic activity. There were approximately 1800 detected events per day from February to July 2015. The number started to decrease from July 2015, and reached less than 100 per day in November 2015. The surface activity of the volcano was estimated to have ceased in November 2015. Characteristic events began re-occurring in the middle of April 2017. The number of events reached approximately 1400 events per day at the end of May 2017. Seafloor seismic observations using OBSs are a powerful tool for continuous monitoring of island volcanic activity. |
| first_indexed | 2024-12-10T22:05:54Z |
| format | Article |
| id | doaj.art-6ecf613042eb41d39092f54917ccc699 |
| institution | Directory Open Access Journal |
| issn | 1880-5981 |
| language | English |
| last_indexed | 2024-12-10T22:05:54Z |
| publishDate | 2017-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Earth, Planets and Space |
| spelling | doaj.art-6ecf613042eb41d39092f54917ccc6992022-12-22T01:31:45ZengSpringerOpenEarth, Planets and Space1880-59812017-11-016911910.1186/s40623-017-0747-7Continuous seismic monitoring of Nishinoshima volcano, Izu-Ogasawara, by using long-term ocean bottom seismometersMasanao Shinohara0Mie Ichihara1Shin’ichi Sakai2Tomoaki Yamada3Minoru Takeo4Hiroko Sugioka5Yutaka Nagaoka6Akimichi Takagi7Taisei Morishita8Tomozo Ono9Azusa Nishizawa10Earthquake Research Institute, The University of TokyoEarthquake Research Institute, The University of TokyoEarthquake Research Institute, The University of TokyoEarthquake Research Institute, The University of TokyoEarthquake Research Institute, The University of TokyoDepartment of Planetology, Graduate School of Science, Kobe UniversityMeteorological Research Institute, Japan Meteorological AgencyMeteorological Research Institute, Japan Meteorological AgencyHydrographic and Oceanographic Department, Japan Coast GuardHydrographic and Oceanographic Department, Japan Coast GuardHydrographic and Oceanographic Department, Japan Coast GuardAbstract Nishinoshima in Izu-Ogasawara started erupting in November 2013, and the island size increased. Continuous monitoring is important for study of the formation process. Since it is difficult to make continuous observations on a remote uninhabited island, we started seismic observations near Nishinoshima using ocean bottom seismometers (OBSs) from February 2015. Our OBSs have a recording period of 1 year, and recovery and re-deployment of OBSs were repeated to make continuous observations. The OBSs were deployed with distances of less than 13 km from the crater. Events with particular characteristics were frequently recorded during the eruption period and are estimated to correlate with the release of plumes from the crater by comparison with temporal on-site records using a video camera and microphones. We estimated the number of events using the amplitude average of records to monitor volcanic activity. There were approximately 1800 detected events per day from February to July 2015. The number started to decrease from July 2015, and reached less than 100 per day in November 2015. The surface activity of the volcano was estimated to have ceased in November 2015. Characteristic events began re-occurring in the middle of April 2017. The number of events reached approximately 1400 events per day at the end of May 2017. Seafloor seismic observations using OBSs are a powerful tool for continuous monitoring of island volcanic activity.http://link.springer.com/article/10.1186/s40623-017-0747-7NishinoshimaVolcanic eruptionContinuous seismic monitoringOcean bottom seismometer (OBS) |
| spellingShingle | Masanao Shinohara Mie Ichihara Shin’ichi Sakai Tomoaki Yamada Minoru Takeo Hiroko Sugioka Yutaka Nagaoka Akimichi Takagi Taisei Morishita Tomozo Ono Azusa Nishizawa Continuous seismic monitoring of Nishinoshima volcano, Izu-Ogasawara, by using long-term ocean bottom seismometers Earth, Planets and Space Nishinoshima Volcanic eruption Continuous seismic monitoring Ocean bottom seismometer (OBS) |
| title | Continuous seismic monitoring of Nishinoshima volcano, Izu-Ogasawara, by using long-term ocean bottom seismometers |
| title_full | Continuous seismic monitoring of Nishinoshima volcano, Izu-Ogasawara, by using long-term ocean bottom seismometers |
| title_fullStr | Continuous seismic monitoring of Nishinoshima volcano, Izu-Ogasawara, by using long-term ocean bottom seismometers |
| title_full_unstemmed | Continuous seismic monitoring of Nishinoshima volcano, Izu-Ogasawara, by using long-term ocean bottom seismometers |
| title_short | Continuous seismic monitoring of Nishinoshima volcano, Izu-Ogasawara, by using long-term ocean bottom seismometers |
| title_sort | continuous seismic monitoring of nishinoshima volcano izu ogasawara by using long term ocean bottom seismometers |
| topic | Nishinoshima Volcanic eruption Continuous seismic monitoring Ocean bottom seismometer (OBS) |
| url | http://link.springer.com/article/10.1186/s40623-017-0747-7 |
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