| タイトル | 有限要素法による十勝岳62-I I火口周辺の局所的地殻変動の予備解析 |
| その他のタイトル | Preliminary FEM analysis of the local deformation around the 62-II eruptive vent at Mt. Tokachi |
| DOI | info:doi/10.14943/gbhu.78.11 |
| 本文（外部サイト） | https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/58237/1/GBHU_78_p11-.pdf |
| 参考URL | http://hdl.handle.net/2115/58237 |
| 著者（日） | 奥山, 哲; 高橋, 浩晃 |
| 発行日 | 2015-03-19 |
| 発行機関など | 北海道大学大学院理学研究院 |
| 刊行物名 | 北海道大学地球物理学研究報告 |
| 巻 | 78 |
| 開始ページ | 11 |
| 終了ページ | 18 |
| 刊行年月日 | 2015-03-19 |
| 言語 | jpn |
| 内容記述 | We present the result of our preliminary FEM analysis of local deformation at Mt. Tokachi. Since 2006, displacement of several cm/yr has been observed by GPS measurement and SAR interferometry at 62-II eruptive vent which was formed by the eruptive event in 1962. The spatial scale of the deformation observed by SAR interferometry is around 2 km. This indicates that the deformation source is at the depth of less than 1 km, supporting that the deformation source is the hydrothermal activity rather than the magma chamber. As a preliminary analysis, we assumed spheroidal pressure source beneath the 62-II vent and simulated the surface deformation to observe the relation between the surface deformation and source depth/shape. We then compared the simulated deformation and SAR interferometry result to find that prolate spheroid (flattening of 0.8) at the depth of 200 m best explains the observation. |
| 資料種別 | Departmental Bulletin Paper |
| 著者版フラグ | publisher |
| ISSN | 0439-3503 |
| NCID | AN0008976X |
| 権利 | |
