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Intermittent inflations recorded by broadband seismometers prior to caldera formation at Miyake-jima volcano in 2000
https://nied-repo.bosai.go.jp/records/2788
https://nied-repo.bosai.go.jp/records/278827e7f5b9-e021-4792-ae23-e4e63db15582
| Item type | researchmap(1) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2023-03-30 | |||||||||||||
| タイトル | ||||||||||||||
| 言語 | en | |||||||||||||
| タイトル | Intermittent inflations recorded by broadband seismometers prior to caldera formation at Miyake-jima volcano in 2000 | |||||||||||||
| 言語 | ||||||||||||||
| 言語 | eng | |||||||||||||
| 著者 |
Tomokazu Kobayashi
× Tomokazu Kobayashi
× Takao Ohminato
× Yoshiaki Ida
× Eisuke Fujita
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| 抄録 | ||||||||||||||
| 内容記述タイプ | Other | |||||||||||||
| 内容記述 | Very-long-period (VLP) pulses with widths of 20. s on velocity seismograms were observed during volcanic activity at Miyake-jima Volcano, Japan in 2000. The VLP events occurred repeatedly during a few days prior to caldera formation and essentially vanished following the onset of caldera collapse. Waveform inversions of the pulse-like signals point to a source offset 3.5. km beneath and 1. km south of the summit. A candidate for the source mechanism is the inflation of an elliptical cylinder with axis tilted 20-30° from vertical and major axis of the elliptical cross section oriented northeast-southwest. The inferred mechanism appears consistent with a step-like pressurization of a magma reservoir impacted by a falling rock mass in response to gravitational instability. The repeated occurrences of the rock collapses lead to the caldera formation at Miyake-jima. c 2012 Elsevier B.V. | |||||||||||||
| 言語 | en | |||||||||||||
| 書誌情報 |
en : Earth and Planetary Science Letters 巻 357-358, p. 145-151, 発行日 2012-12-01 |
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| ISSN | ||||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||||
| 収録物識別子 | 0012-821X | |||||||||||||
| DOI | ||||||||||||||
| 関連識別子 | 10.1016/j.epsl.2012.09.039 | |||||||||||||
