Heterogeneous rheology controlled postseismic deformation of the 2011 Tohoku‐Oki earthquake
Abstract Using two‐dimensional finite element modeling, we reproduced the observed postseismic deformation of the 2011 Tohoku‐Oki earthquake. Our model, which accounts for the lithosphere‐asthenosphere boundary and weak zones beneath volcanoes, was able to reproduce small‐scale (<20 km) perturbat...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2016-05-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL068113 |
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| _version_ | 1849725759644499968 |
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| author | Jun Muto Bunichiro Shibazaki Takeshi Iinuma Yoshihiro Ito Yusaku Ohta Satoshi Miura Yoshihiko Nakai |
| author_facet | Jun Muto Bunichiro Shibazaki Takeshi Iinuma Yoshihiro Ito Yusaku Ohta Satoshi Miura Yoshihiko Nakai |
| author_sort | Jun Muto |
| collection | DOAJ |
| description | Abstract Using two‐dimensional finite element modeling, we reproduced the observed postseismic deformation of the 2011 Tohoku‐Oki earthquake. Our model, which accounts for the lithosphere‐asthenosphere boundary and weak zones beneath volcanoes, was able to reproduce small‐scale (<20 km) perturbations in postseismic deformation observed by the dense geodetic network, such as local subsidence around Quaternary volcanoes. The inverted afterslip has a peak at the downdip limit of the main rupture region on the subducting plate interface, consistent with physical predictions. The combination of afterslip and viscoelastic relaxation in a heterogeneous rheology model explains the observations well, even on small scales. |
| format | Article |
| id | doaj-art-31a94c29c3b24d478c35ca941b8ff1ab |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-31a94c29c3b24d478c35ca941b8ff1ab2025-08-20T03:10:24ZengWileyGeophysical Research Letters0094-82761944-80072016-05-0143104971497810.1002/2016GL068113Heterogeneous rheology controlled postseismic deformation of the 2011 Tohoku‐Oki earthquakeJun Muto0Bunichiro Shibazaki1Takeshi Iinuma2Yoshihiro Ito3Yusaku Ohta4Satoshi Miura5Yoshihiko Nakai6Department of Earth Science Tohoku University Sendai JapanInternational Institute of Seismology and Earthquake Engineering Building Research Institute Tsukuba JapanJapan Agency for Marine‐Earth Science and Technology Yokohama JapanDisaster Prevention Research Institute Kyoto University Uji JapanDepartment of Geophysics Tohoku University Sendai JapanDepartment of Geophysics Tohoku University Sendai JapanInternational Institute of Seismology and Earthquake Engineering Building Research Institute Tsukuba JapanAbstract Using two‐dimensional finite element modeling, we reproduced the observed postseismic deformation of the 2011 Tohoku‐Oki earthquake. Our model, which accounts for the lithosphere‐asthenosphere boundary and weak zones beneath volcanoes, was able to reproduce small‐scale (<20 km) perturbations in postseismic deformation observed by the dense geodetic network, such as local subsidence around Quaternary volcanoes. The inverted afterslip has a peak at the downdip limit of the main rupture region on the subducting plate interface, consistent with physical predictions. The combination of afterslip and viscoelastic relaxation in a heterogeneous rheology model explains the observations well, even on small scales.https://doi.org/10.1002/2016GL068113postseismic deformationviscoelastic relaxationTohoku‐Oki earthquakerheologygeodesysubduction zone |
| spellingShingle | Jun Muto Bunichiro Shibazaki Takeshi Iinuma Yoshihiro Ito Yusaku Ohta Satoshi Miura Yoshihiko Nakai Heterogeneous rheology controlled postseismic deformation of the 2011 Tohoku‐Oki earthquake Geophysical Research Letters postseismic deformation viscoelastic relaxation Tohoku‐Oki earthquake rheology geodesy subduction zone |
| title | Heterogeneous rheology controlled postseismic deformation of the 2011 Tohoku‐Oki earthquake |
| title_full | Heterogeneous rheology controlled postseismic deformation of the 2011 Tohoku‐Oki earthquake |
| title_fullStr | Heterogeneous rheology controlled postseismic deformation of the 2011 Tohoku‐Oki earthquake |
| title_full_unstemmed | Heterogeneous rheology controlled postseismic deformation of the 2011 Tohoku‐Oki earthquake |
| title_short | Heterogeneous rheology controlled postseismic deformation of the 2011 Tohoku‐Oki earthquake |
| title_sort | heterogeneous rheology controlled postseismic deformation of the 2011 tohoku oki earthquake |
| topic | postseismic deformation viscoelastic relaxation Tohoku‐Oki earthquake rheology geodesy subduction zone |
| url | https://doi.org/10.1002/2016GL068113 |
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