{"title":"库马恩喜马拉雅山的高分辨率速度和应变率场:对地震力矩预算的影响","authors":"Himanshu Verma , Sumanta Pasari , Yogendra Sharma , Kuo-En Ching","doi":"10.1016/j.jog.2024.102023","DOIUrl":null,"url":null,"abstract":"<div><p>The collision between Indian and Eurasian tectonic plates results in a series of earthquakes, releasing stored elastic strain accumulated over a long period. This research utilizes 22 new and 26 previously published GPS velocities along with nine years of InSAR observations to estimate high-resolution velocity and strain rate fields across the Kumaun Himalaya. The resulting high-resolution velocity field ranges between 0.5 and 14 mm/yr relative to the India-fixed reference frame. The geodetic strain rate is not uniform across the study region and the higher strain rates are observed along the Main Central Thrust. The areal change rate along the Kumaun Himalaya indicates a significant amount of tectonic compression, with an average value of − 0.08 <em>μstrain</em>∕<em>yr</em>, while the maximum shear strain rate in the region has a mean value of 0.08 <em>μstrain</em>∕<em>yr</em>. The moment deficit rate, based on accumulated strain and energy release over 200 years, turns out to be 7.59 × 10<sup>18</sup><em>Nm</em>∕<em>yr</em> along the Kumaun Himalaya. This suggests that the study region can generate a great earthquake (Mw 8.1) in the future.</p></div>","PeriodicalId":54823,"journal":{"name":"Journal of Geodynamics","volume":null,"pages":null},"PeriodicalIF":2.1000,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"High-resolution velocity and strain rate fields in the Kumaun Himalaya: An implication for seismic moment budget\",\"authors\":\"Himanshu Verma , Sumanta Pasari , Yogendra Sharma , Kuo-En Ching\",\"doi\":\"10.1016/j.jog.2024.102023\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The collision between Indian and Eurasian tectonic plates results in a series of earthquakes, releasing stored elastic strain accumulated over a long period. This research utilizes 22 new and 26 previously published GPS velocities along with nine years of InSAR observations to estimate high-resolution velocity and strain rate fields across the Kumaun Himalaya. The resulting high-resolution velocity field ranges between 0.5 and 14 mm/yr relative to the India-fixed reference frame. The geodetic strain rate is not uniform across the study region and the higher strain rates are observed along the Main Central Thrust. The areal change rate along the Kumaun Himalaya indicates a significant amount of tectonic compression, with an average value of − 0.08 <em>μstrain</em>∕<em>yr</em>, while the maximum shear strain rate in the region has a mean value of 0.08 <em>μstrain</em>∕<em>yr</em>. The moment deficit rate, based on accumulated strain and energy release over 200 years, turns out to be 7.59 × 10<sup>18</sup><em>Nm</em>∕<em>yr</em> along the Kumaun Himalaya. This suggests that the study region can generate a great earthquake (Mw 8.1) in the future.</p></div>\",\"PeriodicalId\":54823,\"journal\":{\"name\":\"Journal of Geodynamics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2024-03-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Geodynamics\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0264370724000061\",\"RegionNum\":3,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"GEOCHEMISTRY & GEOPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Geodynamics","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0264370724000061","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
High-resolution velocity and strain rate fields in the Kumaun Himalaya: An implication for seismic moment budget
The collision between Indian and Eurasian tectonic plates results in a series of earthquakes, releasing stored elastic strain accumulated over a long period. This research utilizes 22 new and 26 previously published GPS velocities along with nine years of InSAR observations to estimate high-resolution velocity and strain rate fields across the Kumaun Himalaya. The resulting high-resolution velocity field ranges between 0.5 and 14 mm/yr relative to the India-fixed reference frame. The geodetic strain rate is not uniform across the study region and the higher strain rates are observed along the Main Central Thrust. The areal change rate along the Kumaun Himalaya indicates a significant amount of tectonic compression, with an average value of − 0.08 μstrain∕yr, while the maximum shear strain rate in the region has a mean value of 0.08 μstrain∕yr. The moment deficit rate, based on accumulated strain and energy release over 200 years, turns out to be 7.59 × 1018Nm∕yr along the Kumaun Himalaya. This suggests that the study region can generate a great earthquake (Mw 8.1) in the future.
期刊介绍:
The Journal of Geodynamics is an international and interdisciplinary forum for the publication of results and discussions of solid earth research in geodetic, geophysical, geological and geochemical geodynamics, with special emphasis on the large scale processes involved.