On the possibility of the 2011 Tohoku-oki earthquake reactivating Shinmoe-dake volcano, southwest Japan: insights from strain data measured in vaults
The Shinmoe-dake volcano in southwest Japan, which produced its first major eruption in 52 yr on 26 January 2011 but had been quiescent since 1 March, re-erupted on 13 March. It was only two days after the occurrence of the <i>M</i> = 9.0 Tohoku-oki earthquake in eastern...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2011-09-01
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| Series: | Natural Hazards and Earth System Sciences |
| Online Access: | http://www.nat-hazards-earth-syst-sci.net/11/2655/2011/nhess-11-2655-2011.pdf |
| _version_ | 1817999134972444672 |
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| author | K. Yamazaki M. Teraishi S. Komatsu Y. Sonoda Y. Kano |
| author_facet | K. Yamazaki M. Teraishi S. Komatsu Y. Sonoda Y. Kano |
| author_sort | K. Yamazaki |
| collection | DOAJ |
| description | The Shinmoe-dake volcano in southwest Japan, which produced its first major eruption in 52 yr on 26 January 2011 but had been quiescent since 1 March, re-erupted on 13 March. It was only two days after the occurrence of the <i>M</i> = 9.0 Tohoku-oki earthquake in eastern Japan. The coincidence of the two events raises the question of whether the earthquake triggered the volcanic activity. As a provisional but rapid assessment of this question, we examined high-resolution strain data at a site located 18 km from Shinmoe-dake. In terms of the Tohoku-oki earthquake, three points can be drawn from the strain data: (1) static strain changes were less than 0.05 × 10<sup>&minus;6</sup>, which is too small to trigger an eruption; (2) the amplitudes of dynamic strain changes are on the order of 10<sup>&minus;6</sup>, which may trigger seismicity or volcanic eruption; and (3) strain rates were not accelerated, which indicates no significant change in magma pressure. Comparing these results with reports of other eruptions coincident with seismic events, and considering a scenario in which a seismic event triggered an eruption, we tentatively conclude that the eruption on 13 March was not a triggered event. However, this conclusion may be revised after analyzing seismic data. |
| first_indexed | 2024-04-14T03:04:07Z |
| format | Article |
| id | doaj.art-af016693c61d4f73a51742e3a9a0554b |
| institution | Directory Open Access Journal |
| issn | 1561-8633 1684-9981 |
| language | English |
| last_indexed | 2024-04-14T03:04:07Z |
| publishDate | 2011-09-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Natural Hazards and Earth System Sciences |
| spelling | doaj.art-af016693c61d4f73a51742e3a9a0554b2022-12-22T02:15:48ZengCopernicus PublicationsNatural Hazards and Earth System Sciences1561-86331684-99812011-09-011192655266110.5194/nhess-11-2655-2011On the possibility of the 2011 Tohoku-oki earthquake reactivating Shinmoe-dake volcano, southwest Japan: insights from strain data measured in vaultsK. YamazakiM. TeraishiS. KomatsuY. SonodaY. KanoThe Shinmoe-dake volcano in southwest Japan, which produced its first major eruption in 52 yr on 26 January 2011 but had been quiescent since 1 March, re-erupted on 13 March. It was only two days after the occurrence of the <i>M</i> = 9.0 Tohoku-oki earthquake in eastern Japan. The coincidence of the two events raises the question of whether the earthquake triggered the volcanic activity. As a provisional but rapid assessment of this question, we examined high-resolution strain data at a site located 18 km from Shinmoe-dake. In terms of the Tohoku-oki earthquake, three points can be drawn from the strain data: (1) static strain changes were less than 0.05 × 10<sup>&minus;6</sup>, which is too small to trigger an eruption; (2) the amplitudes of dynamic strain changes are on the order of 10<sup>&minus;6</sup>, which may trigger seismicity or volcanic eruption; and (3) strain rates were not accelerated, which indicates no significant change in magma pressure. Comparing these results with reports of other eruptions coincident with seismic events, and considering a scenario in which a seismic event triggered an eruption, we tentatively conclude that the eruption on 13 March was not a triggered event. However, this conclusion may be revised after analyzing seismic data.http://www.nat-hazards-earth-syst-sci.net/11/2655/2011/nhess-11-2655-2011.pdf |
| spellingShingle | K. Yamazaki M. Teraishi S. Komatsu Y. Sonoda Y. Kano On the possibility of the 2011 Tohoku-oki earthquake reactivating Shinmoe-dake volcano, southwest Japan: insights from strain data measured in vaults Natural Hazards and Earth System Sciences |
| title | On the possibility of the 2011 Tohoku-oki earthquake reactivating Shinmoe-dake volcano, southwest Japan: insights from strain data measured in vaults |
| title_full | On the possibility of the 2011 Tohoku-oki earthquake reactivating Shinmoe-dake volcano, southwest Japan: insights from strain data measured in vaults |
| title_fullStr | On the possibility of the 2011 Tohoku-oki earthquake reactivating Shinmoe-dake volcano, southwest Japan: insights from strain data measured in vaults |
| title_full_unstemmed | On the possibility of the 2011 Tohoku-oki earthquake reactivating Shinmoe-dake volcano, southwest Japan: insights from strain data measured in vaults |
| title_short | On the possibility of the 2011 Tohoku-oki earthquake reactivating Shinmoe-dake volcano, southwest Japan: insights from strain data measured in vaults |
| title_sort | on the possibility of the 2011 tohoku oki earthquake reactivating shinmoe dake volcano southwest japan insights from strain data measured in vaults |
| url | http://www.nat-hazards-earth-syst-sci.net/11/2655/2011/nhess-11-2655-2011.pdf |
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