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北海道大学地球物理学研究報告 = Geophysical bulletin of Hokkaido University >
第72号 >
雲仙火山周辺域における相対応力場と1990-1995年噴火活動
Title: | 雲仙火山周辺域における相対応力場と1990-1995年噴火活動 |
Other Titles: | Relative stress field around Unzen Volcano and its relationship with the 1990-1995 eruption |
Authors: | 河野, 裕希1 Browse this author | 松本, 聡2 Browse this author | 松島, 健3 Browse this author | 植平, 賢司4 Browse this author | 清水, 洋5 Browse this author | 馬越, 孝道6 Browse this author |
Authors(alt): | Kohno, Yuhki1 | Matsumoto, Satoshi2 | Matsushima, Takeshi3 | Uehira, Kenji4 | Shimizu, Hiroshi5 | Umakoshi, Kodo6 |
Issue Date: | 15-Mar-2009 |
Publisher: | 北海道大学大学院理学研究院自然史科学部門(地球物理学) |
Journal Title: | 北海道大学地球物理学研究報告 |
Journal Title(alt): | Geophysical bulletin of Hokkaido University |
Volume: | 72 |
Start Page: | 363 |
End Page: | 371 |
Abstract: | We investigated a stress field around the magma chamber beneath Unzen Volcano, Kyushu, Japan, which erupted from 1990 until 1995, by using a stress-tensor inversion method. We used P wave polarity data of seismograms by earthquakes occurred during 1985-1999 for analysis. Our result clearly indicated that there were no changes in stress field during the period except for during 1986-1988. This suggested that the magma intrusion into shallower depths did not affect the stress field in this region. Clear change in stress field was observed during 1986-1988. This might be explained by applying the meshtexture crack model proposed by Hill (1977). |
Type: | bulletin (article) |
URI: | http://hdl.handle.net/2115/38165 |
Appears in Collections: | 北海道大学地球物理学研究報告 = Geophysical bulletin of Hokkaido University > 第72号
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