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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
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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