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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86号 >
2003年十勝沖地震(Mw8.0)の余効変動を用いた北海道南西部の粘弾性構造推定
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| Title: | 2003年十勝沖地震(Mw8.0)の余効変動を用いた北海道南西部の粘弾性構造推定 |
| Other Titles: | Estimation of viscoelastic structure in southwestern Hokkaido due to post-seismic deformation of the 2003 Tokachi-oki earthquake (Mw8.0) |
| Authors: | 石田, 優香1 Browse this author | | 高橋, 浩晃2 Browse this author →KAKEN DB | | 大園, 真子3 Browse this author →KAKEN DB |
| Authors(alt): | Ishida, Yuka1 | | Takahashi, Hiroaki2 | | Ohzono, Mako3 |
| Issue Date: | 26-Mar-2023 |
| Publisher: | 北海道大学大学院理学研究院 |
| 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: | 86 |
| Start Page: | 1 |
| End Page: | 12 |
| Abstract: | Long-term post-seismic crustal deformation characteristics in southwestern Hokkaido induced by the 2003 Tokachi-oki earthquake (Mw 8.0) were investigated using the F5 GNSS daily coordinate data. Comparison of the detrended coordinate time series before and after the 2003 Tokachi-oki earthquake indicated that post-seismic horizontal deformation exceeded co-seismic displacements and continued at least 7.5 years until the day of the 2011 off the Pacific coast of Tohoku earthquake (M9.0). Viscoelastic subsurface models were examined to fit to observed horizontal displacement time series. Parameters of elastic layer 20～30km and viscosity 1×1018 Pa s well reproduced features of observed displacement time series. Estimated coefficient suggest relatively low viscosity in southwestern Hokkaido and was well consistent with that from previous studies in this region. |
| Rights: | https://creativecommons.org/licenses/BY-NC/4.0/ |
| Type: | bulletin (article) |
| URI: | http://hdl.handle.net/2115/88554 |
| Appears in Collections: | 北海道大学地球物理学研究報告 = Geophysical bulletin of Hokkaido University > 第86号
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