Long‐term acceleration of aseismic slip preceding the <b><i>M</i><sub><i>w</i></sub></b> 9 Tohoku‐oki earthquake: Constraints from repeating earthquakes
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- Andreas P. Mavrommatis
- Department of Geophysics Stanford University Stanford California USA
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- Paul Segall
- Department of Geophysics Stanford University Stanford California USA
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- Naoki Uchida
- Graduate School of Science Tohoku University Aoba‐ku Japan
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- Kaj M. Johnson
- Department of Geological Sciences Indiana University Bloomington Indiana USA
書誌事項
- 公開日
- 2015-11-19
- 資源種別
- journal article
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1002/2015gl066069
- 公開者
- American Geophysical Union (AGU)
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説明
<jats:title>Abstract</jats:title><jats:p>A decadal‐scale deformation transient preceding the 2011 <jats:italic>M</jats:italic><jats:sub><jats:italic>w</jats:italic></jats:sub> 9 Tohoku‐oki, Japan, earthquake was reported from continuous GPS data and interpreted as accelerating aseismic slip on the Japan Trench megathrust. Given the unprecedented nature of this transient, independent confirmation of accelerating slip is required. Here we show that changes in the recurrence intervals of repeating earthquakes on the Japan Trench megathrust in the period 1996 to 2011 are consistent with accelerating slip preceding the Tohoku‐oki earthquake. All sequences of repeating earthquakes with statistically significant trends in recurrence interval (at 95% confidence) offshore south central Tohoku occurred at an accelerating rate. Furthermore, estimates of the magnitude of slip acceleration from repeating earthquakes are consistent with the completely independent geodetic estimates. From a joint inversion of the GPS and seismicity data, we infer that a substantial portion of the megathrust experienced accelerating slip, partly surrounding the eventual rupture zone of the <jats:italic>M</jats:italic><jats:sub><jats:italic>w</jats:italic></jats:sub> 9 earthquake.</jats:p>
収録刊行物
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- Geophysical Research Letters
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Geophysical Research Letters 42 (22), 9717-9725, 2015-11-19
American Geophysical Union (AGU)
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詳細情報 詳細情報について
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- CRID
- 1360567179757339136
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- ISSN
- 19448007
- 00948276
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- Web Site
- https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2015GL066069
- https://onlinelibrary.wiley.com/doi/pdf/10.1002/2015GL066069
- https://onlinelibrary.wiley.com/doi/full-xml/10.1002/2015GL066069
- http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.1002%2F2015GL066069
- https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2015GL066069
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- 資料種別
- journal article
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