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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 >
有珠山西山火口群での全磁力測量
| Title: | 有珠山西山火口群での全磁力測量 |
| Other Titles: | Magnetic survey at the 2000 eruption area of Usu volcano |
| Authors: | 小池, 哲司1 Browse this author | | 長谷川, 浩2 Browse this author | | 藤井, 郁子3 Browse this author | | 橋本, 武志4 Browse this author |
| Authors(alt): | Koike, Tetsuji1 | | Hasegawa, Hiroshi2 | | Fujii, Ikuko3 | | Hashimoto, Takeshi4 |
| 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: | 117 |
| End Page: | 124 |
| Abstract: | We conducted a total field magnetic survey in the 2000 eruption area of Mt Usu. A distinct negative magnetic anomaly was found in the geothermal field in the NW part of the survey area. Meanwhile, no clear magnetic anomaly was found around N-B crater, where active fumaroles were seen. Regarding the negative anomaly in the geothermal field, we performed a 3-D inversion of demagnetized prism model. As a result it has been suggested that the magnetic anomaly is due to the demagnetization at a small depth less than 70 m from the ground surface. |
| Type: | bulletin (article) |
| URI: | http://hdl.handle.net/2115/38148 |
| 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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