Multiple fault slip triggered above the 2016 Mw 6.4 MeiNong earthquake in Taiwan
Abstract Rapid shortening in convergent mountain belts is often accommodated by slip on faults at multiple levels in upper crust, but no geodetic observation of slip at multiple levels within hours of a moderate earthquake has been shown before. Here we show clear evidence of fault slip within a sha...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2016-07-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL069351 |
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| author | Mong‐Han Huang Hsin Tung Eric J. Fielding Hsin‐Hua Huang Cunren Liang Chung Huang Jyr‐Ching Hu |
| author_facet | Mong‐Han Huang Hsin Tung Eric J. Fielding Hsin‐Hua Huang Cunren Liang Chung Huang Jyr‐Ching Hu |
| author_sort | Mong‐Han Huang |
| collection | DOAJ |
| description | Abstract Rapid shortening in convergent mountain belts is often accommodated by slip on faults at multiple levels in upper crust, but no geodetic observation of slip at multiple levels within hours of a moderate earthquake has been shown before. Here we show clear evidence of fault slip within a shallower thrust at 5–10 km depth in SW Taiwan triggered by the 2016 Mw 6.4 MeiNong earthquake at 15–20 km depth. We constrain the primary coseismic fault slip with kinematic modeling of seismic and geodetic measurements and constrain the triggered slip and fault geometry using synthetic aperture radar interferometry. The shallower thrust coincides with a proposed duplex located in a region of high fluid pressure and high interseismic uplift rate, and may be sensitive to stress perturbations. Our results imply that under tectonic conditions such as high‐background stress level and high fluid pressure, a moderate lower crustal earthquake can trigger faults at shallower depth. |
| format | Article |
| id | doaj-art-b79cd2530ac6440280acccb9e229144e |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-b79cd2530ac6440280acccb9e229144e2025-08-20T03:10:28ZengWileyGeophysical Research Letters0094-82761944-80072016-07-0143147459746710.1002/2016GL069351Multiple fault slip triggered above the 2016 Mw 6.4 MeiNong earthquake in TaiwanMong‐Han Huang0Hsin Tung1Eric J. Fielding2Hsin‐Hua Huang3Cunren Liang4Chung Huang5Jyr‐Ching Hu6Jet Propulsion Laboratory California Institute of Technology Pasadena California USADepartment of Geosciences National Taiwan University Taipei TaiwanJet Propulsion Laboratory California Institute of Technology Pasadena California USASeismological Laboratory California Institute of Technology Pasadena California USAJet Propulsion Laboratory California Institute of Technology Pasadena California USADepartment of Geosciences National Taiwan University Taipei TaiwanDepartment of Geosciences National Taiwan University Taipei TaiwanAbstract Rapid shortening in convergent mountain belts is often accommodated by slip on faults at multiple levels in upper crust, but no geodetic observation of slip at multiple levels within hours of a moderate earthquake has been shown before. Here we show clear evidence of fault slip within a shallower thrust at 5–10 km depth in SW Taiwan triggered by the 2016 Mw 6.4 MeiNong earthquake at 15–20 km depth. We constrain the primary coseismic fault slip with kinematic modeling of seismic and geodetic measurements and constrain the triggered slip and fault geometry using synthetic aperture radar interferometry. The shallower thrust coincides with a proposed duplex located in a region of high fluid pressure and high interseismic uplift rate, and may be sensitive to stress perturbations. Our results imply that under tectonic conditions such as high‐background stress level and high fluid pressure, a moderate lower crustal earthquake can trigger faults at shallower depth.https://doi.org/10.1002/2016GL069351coseismic deformationfinite source inversionstress triggeringSW Taiwan tectonics |
| spellingShingle | Mong‐Han Huang Hsin Tung Eric J. Fielding Hsin‐Hua Huang Cunren Liang Chung Huang Jyr‐Ching Hu Multiple fault slip triggered above the 2016 Mw 6.4 MeiNong earthquake in Taiwan Geophysical Research Letters coseismic deformation finite source inversion stress triggering SW Taiwan tectonics |
| title | Multiple fault slip triggered above the 2016 Mw 6.4 MeiNong earthquake in Taiwan |
| title_full | Multiple fault slip triggered above the 2016 Mw 6.4 MeiNong earthquake in Taiwan |
| title_fullStr | Multiple fault slip triggered above the 2016 Mw 6.4 MeiNong earthquake in Taiwan |
| title_full_unstemmed | Multiple fault slip triggered above the 2016 Mw 6.4 MeiNong earthquake in Taiwan |
| title_short | Multiple fault slip triggered above the 2016 Mw 6.4 MeiNong earthquake in Taiwan |
| title_sort | multiple fault slip triggered above the 2016 mw 6 4 meinong earthquake in taiwan |
| topic | coseismic deformation finite source inversion stress triggering SW Taiwan tectonics |
| url | https://doi.org/10.1002/2016GL069351 |
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