GPS-BASED MONITORING OF CRUSTAL DEFORMATION IN GARHWAL-KUMAUN HIMALAYA

International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences

Sharma, Y.^1¹  Pasari, S.^1²  Dikshit, O.^2³ 

[1] Birla Institute of Technology & Science, Pilani, India^1;Indian Institute of Technology Kanpur, India^2;National Cheng Kung University, Tainan, Taiwan^3

关键词: Earthquakes;    GPS;    GAMIT-GLOBK;    Garhwal-Kumaun Himalaya;    Slip rate;   

DOI  :  10.5194/isprs-archives-XLII-5-451-2018

学科分类：地球科学(综合)

来源: Copernicus Publications

【 摘 要 】

The Himalayan region has experienced a number of large magnitude earthquakes in the past. Seismicity is mainly due to tectonic activity along the thrust faults that trend parallel to the Himalayan mountain belt. In order to study the ongoing tectonic process, we report Global Positioning System (GPS) measurements of crustal deformation in the Garhwal-Kumaun Himalaya through two continuous and 21 campaign stations. We collect GPS data since 2013 and analyze with the GAMIT/GLOBK suite of postprocessing software. Our estimated surface velocities in ITRF2008, India-fixed, and Eurasia-fixed reference frame lie in the range of 42–52 mm/yr, 1–6 mm/yr, and 31–37 mm/yr, respectively. We observe insignificant slip rate (∼ 1 mm/yr) of HFT that indicates its locking behavior. The slip rates of MBT and MCT, however, are consistent with the seismic activity of the study region.

【 授权许可】

CC BY