Surge of Mangla reservoir loading promoted failure on active Décollement of western Himalayas
The extreme rainfall weather during the Indian monsoon season has increased in recent decades changing the hydrological mass distribution that may be responsible for triggering regional earthquakes. In the western Himalayas, a shallow Mw 5.7 earthquake took place right after the withdrawal of the 20...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-10-01
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| Series: | International Journal of Applied Earth Observations and Geoinformation |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0303243421001082 |
| _version_ | 1818859590064799744 |
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| author | Lei Xie Wenbin Xu Xiaoge Liu Xiaoli Ding |
| author_facet | Lei Xie Wenbin Xu Xiaoge Liu Xiaoli Ding |
| author_sort | Lei Xie |
| collection | DOAJ |
| description | The extreme rainfall weather during the Indian monsoon season has increased in recent decades changing the hydrological mass distribution that may be responsible for triggering regional earthquakes. In the western Himalayas, a shallow Mw 5.7 earthquake took place right after the withdrawal of the 2019 unusual Indian summer monsoon resulting in a rapid increase of ~4.5 km3 of water storage at the nearby Mangla reservoir within three months. Through a joint inversion of space geodetic and teleseismic data, we found that the mainshock occurred on the décollement structure of the Main Himalayan Thrust in the western Himalayas, which was previously underdetermined. The significant water loading, and pore pressure diffusion led to Coulomb stress increases of ~10 kPa on the maximum coseismic slip zone promoting fault failure. Our findings demonstrate that climate change could influence certain reservoir-associated earthquakes in the Himalayas. We provide recommendations to improve the regulations for the reservoir operations in Mangla and probably other contexts with similar tectonic settings in the Himalayas during the monsoon season. |
| first_indexed | 2024-12-19T09:14:36Z |
| format | Article |
| id | doaj.art-1e87b29ee0204db6b931ec2db3c67fb8 |
| institution | Directory Open Access Journal |
| issn | 1569-8432 |
| language | English |
| last_indexed | 2024-12-19T09:14:36Z |
| publishDate | 2021-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Applied Earth Observations and Geoinformation |
| spelling | doaj.art-1e87b29ee0204db6b931ec2db3c67fb82022-12-21T20:28:07ZengElsevierInternational Journal of Applied Earth Observations and Geoinformation1569-84322021-10-01102102401Surge of Mangla reservoir loading promoted failure on active Décollement of western HimalayasLei Xie0Wenbin Xu1Xiaoge Liu2Xiaoli Ding3The Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, ChinaSchool of Geosciences and Info-physics, Central South University, China; Corresponding author.School of Geosciences and Info-physics, Central South University, ChinaThe Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, ChinaThe extreme rainfall weather during the Indian monsoon season has increased in recent decades changing the hydrological mass distribution that may be responsible for triggering regional earthquakes. In the western Himalayas, a shallow Mw 5.7 earthquake took place right after the withdrawal of the 2019 unusual Indian summer monsoon resulting in a rapid increase of ~4.5 km3 of water storage at the nearby Mangla reservoir within three months. Through a joint inversion of space geodetic and teleseismic data, we found that the mainshock occurred on the décollement structure of the Main Himalayan Thrust in the western Himalayas, which was previously underdetermined. The significant water loading, and pore pressure diffusion led to Coulomb stress increases of ~10 kPa on the maximum coseismic slip zone promoting fault failure. Our findings demonstrate that climate change could influence certain reservoir-associated earthquakes in the Himalayas. We provide recommendations to improve the regulations for the reservoir operations in Mangla and probably other contexts with similar tectonic settings in the Himalayas during the monsoon season.http://www.sciencedirect.com/science/article/pii/S0303243421001082Mangla reservoirReservoir-associated earthquakeInSARDécollementHydrological loadings |
| spellingShingle | Lei Xie Wenbin Xu Xiaoge Liu Xiaoli Ding Surge of Mangla reservoir loading promoted failure on active Décollement of western Himalayas International Journal of Applied Earth Observations and Geoinformation Mangla reservoir Reservoir-associated earthquake InSAR Décollement Hydrological loadings |
| title | Surge of Mangla reservoir loading promoted failure on active Décollement of western Himalayas |
| title_full | Surge of Mangla reservoir loading promoted failure on active Décollement of western Himalayas |
| title_fullStr | Surge of Mangla reservoir loading promoted failure on active Décollement of western Himalayas |
| title_full_unstemmed | Surge of Mangla reservoir loading promoted failure on active Décollement of western Himalayas |
| title_short | Surge of Mangla reservoir loading promoted failure on active Décollement of western Himalayas |
| title_sort | surge of mangla reservoir loading promoted failure on active decollement of western himalayas |
| topic | Mangla reservoir Reservoir-associated earthquake InSAR Décollement Hydrological loadings |
| url | http://www.sciencedirect.com/science/article/pii/S0303243421001082 |
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