Coseismic Slip Deficit of the 2017 Mw 6.5 Ormoc Earthquake That Occurred Along a Creeping Segment and Geothermal Field of the Philippine Fault
Abstract Coseismic surface deformation imaged through interferometric synthetic aperture radar (InSAR) measurements was used to estimate the fault geometry and slip distribution of the 2017 Mw 6.5 Ormoc earthquake along a creeping segment of the Philippine Fault on Leyte Island. Our best fitting fau...
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| Format: | Article |
| Language: | English |
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Wiley
2018-03-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2017GL076417 |
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| author | Ying‐Hui Yang Min‐Chien Tsai Jyr‐Ching Hu Mario A. Aurelio Manabu Hashimoto John Agustin P. Escudero Zhe Su Qiang Chen |
| author_facet | Ying‐Hui Yang Min‐Chien Tsai Jyr‐Ching Hu Mario A. Aurelio Manabu Hashimoto John Agustin P. Escudero Zhe Su Qiang Chen |
| author_sort | Ying‐Hui Yang |
| collection | DOAJ |
| description | Abstract Coseismic surface deformation imaged through interferometric synthetic aperture radar (InSAR) measurements was used to estimate the fault geometry and slip distribution of the 2017 Mw 6.5 Ormoc earthquake along a creeping segment of the Philippine Fault on Leyte Island. Our best fitting faulting model suggests that the coseismic rupture occurred on a fault plane with high dip angle of 78.5° and strike angle of 325.8°, and the estimated maximum fault slip of 2.3 m is located at 6.5 km east‐northeast of the town of Kananga. The recognized insignificant slip in the Tongonan geothermal field zone implies that the plastic behavior caused by high geothermal gradient underneath the Tongonan geothermal field could prevent the coseismic failure in heated rock mass in this zone. The predicted Coulomb failure stress change shows that a significant positive Coulomb failure stress change occurred along the SE segment of central Philippine Fault with insignificant coseismic slip and infrequent aftershocks, which suggests an increasing risk for future seismic hazard. |
| format | Article |
| id | doaj-art-8a7af7fcef7940bb88331c4d93a0dcbc |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2018-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-8a7af7fcef7940bb88331c4d93a0dcbc2024-12-20T12:14:58ZengWileyGeophysical Research Letters0094-82761944-80072018-03-014562659266810.1002/2017GL076417Coseismic Slip Deficit of the 2017 Mw 6.5 Ormoc Earthquake That Occurred Along a Creeping Segment and Geothermal Field of the Philippine FaultYing‐Hui Yang0Min‐Chien Tsai1Jyr‐Ching Hu2Mario A. Aurelio3Manabu Hashimoto4John Agustin P. Escudero5Zhe Su6Qiang Chen7School of Civil Engineering and Architecture Southwest Petroleum University Chengdu ChinaSeismological Center, Central Weather Bureau Taipei TaiwanDepartment of Geosciences National Taiwan University Taipei TaiwanNational Institute of Geological Sciences University of the Philippines Quezon City PhilippinesDisaster Prevention Research Institute Kyoto University Kyoto JapanNational Institute of Geological Sciences University of the Philippines Quezon City PhilippinesKey Laboratory of Crustal Dynamics Institute of Crustal Dynamics, China Earthquake Administration Beijing ChinaDepartment of Remote Sensing and Geoinformation Engineering Southwest Jiaotong University Chengdu ChinaAbstract Coseismic surface deformation imaged through interferometric synthetic aperture radar (InSAR) measurements was used to estimate the fault geometry and slip distribution of the 2017 Mw 6.5 Ormoc earthquake along a creeping segment of the Philippine Fault on Leyte Island. Our best fitting faulting model suggests that the coseismic rupture occurred on a fault plane with high dip angle of 78.5° and strike angle of 325.8°, and the estimated maximum fault slip of 2.3 m is located at 6.5 km east‐northeast of the town of Kananga. The recognized insignificant slip in the Tongonan geothermal field zone implies that the plastic behavior caused by high geothermal gradient underneath the Tongonan geothermal field could prevent the coseismic failure in heated rock mass in this zone. The predicted Coulomb failure stress change shows that a significant positive Coulomb failure stress change occurred along the SE segment of central Philippine Fault with insignificant coseismic slip and infrequent aftershocks, which suggests an increasing risk for future seismic hazard.https://doi.org/10.1002/2017GL076417coseismic slipcreeping faultthe Philippine FaultInSARgeothermal field |
| spellingShingle | Ying‐Hui Yang Min‐Chien Tsai Jyr‐Ching Hu Mario A. Aurelio Manabu Hashimoto John Agustin P. Escudero Zhe Su Qiang Chen Coseismic Slip Deficit of the 2017 Mw 6.5 Ormoc Earthquake That Occurred Along a Creeping Segment and Geothermal Field of the Philippine Fault Geophysical Research Letters coseismic slip creeping fault the Philippine Fault InSAR geothermal field |
| title | Coseismic Slip Deficit of the 2017 Mw 6.5 Ormoc Earthquake That Occurred Along a Creeping Segment and Geothermal Field of the Philippine Fault |
| title_full | Coseismic Slip Deficit of the 2017 Mw 6.5 Ormoc Earthquake That Occurred Along a Creeping Segment and Geothermal Field of the Philippine Fault |
| title_fullStr | Coseismic Slip Deficit of the 2017 Mw 6.5 Ormoc Earthquake That Occurred Along a Creeping Segment and Geothermal Field of the Philippine Fault |
| title_full_unstemmed | Coseismic Slip Deficit of the 2017 Mw 6.5 Ormoc Earthquake That Occurred Along a Creeping Segment and Geothermal Field of the Philippine Fault |
| title_short | Coseismic Slip Deficit of the 2017 Mw 6.5 Ormoc Earthquake That Occurred Along a Creeping Segment and Geothermal Field of the Philippine Fault |
| title_sort | coseismic slip deficit of the 2017 mw 6 5 ormoc earthquake that occurred along a creeping segment and geothermal field of the philippine fault |
| topic | coseismic slip creeping fault the Philippine Fault InSAR geothermal field |
| url | https://doi.org/10.1002/2017GL076417 |
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