India plate angular velocity and contemporary deformation rates from continuous GPS measurements from 1996 to 2015
Autor: | Pallabee Choudhury, Rakesh K. Dumka, Sridevi Jade, Harsh Bhu, Kireet Kumar, T. S. Shrungeshwara |
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Rok vydání: | 2017 |
Předmět: |
Multidisciplinary
010504 meteorology & atmospheric sciences business.industry lcsh:R lcsh:Medicine Angular velocity Deformation (meteorology) 010502 geochemistry & geophysics Geodesy 01 natural sciences Frame of reference Euler's rotation theorem Article symbols.namesake Plate tectonics symbols Global Positioning System lcsh:Q lcsh:Science business Geology 0105 earth and related environmental sciences |
Zdroj: | Scientific Reports Scientific Reports, Vol 7, Iss 1, Pp 1-16 (2017) |
ISSN: | 2045-2322 |
Popis: | We estimate a new angular velocity for the India plate and contemporary deformation rates in the plate interior and along its seismically active margins from Global Positioning System (GPS) measurements from 1996 to 2015 at 70 continuous and 3 episodic stations. A new India-ITRF2008 angular velocity is estimated from 30 GPS sites, which include stations from western and eastern regions of the plate interior that were unrepresented or only sparsely sampled in previous studies. Our newly estimated India-ITRF2008 Euler pole is located significantly closer to the plate with ~3% higher angular velocity than all previous estimates and thus predicts more rapid variations in rates and directions along the plate boundaries. The 30 India plate GPS site velocities are well fit by the new angular velocity, with north and east RMS misfits of only 0.8 and 0.9 mm/yr, respectively. India fixed velocities suggest an approximate of 1–2 mm/yr intra-plate deformation that might be concentrated along regional dislocations, faults in Peninsular India, Kachchh and Indo-Gangetic plain. Relative to our newly-defined India plate frame of reference, the newly estimated velocities for 43 other GPS sites along the plate margins give insights into active deformation along India’s seismically active northern and eastern boundaries. |
Databáze: | OpenAIRE |
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