GPS STUDIES AT C-MMACS
Notable conclusions that arise from the GPS studies in the Indian
Subcontinent are as follows.
C-MMACS has 13 permanent GPS stations in the Indian
. These stations were set up in collaboration with local
universities i.e Aizawl (Pacchhunga University College), Imphal (Manipur
University), Gauhati (Gauhati University), Shillong (Central Seismological
Observatory), Lumami ( Nagaland University), Panthang (G B Pant Institute
of Himalayan Environment), Tezpur (Tezpur University), Bomdilla (Indian
Institute of Astrophysics and Tezpur University) and Bhopal (Regional Research
Laboratory) and are now handed over to them.
Southern peninsular India moves
as a rigid plate with the velocity approximately equal to Indian
plate velocity and regional deformation in southern peninsula
Convergence rates in Himalaya indicate
that significant amount of India and Eurasia convergence is
GPS derived velocity and deformation rates in the Himalayan arc vary
from west to east suggesting the deformation mechanisms in
Garhwal, Kumaun and Sikkim
Himalayas are different and are to be treated differently.
GPS derived extension vector between the Himalayan sites and Lhasa
is consistent with the east west extension of southern Tibet.
Kachchh GPS results give post seismic deformation consistent with Bhuj
rupture zone as GPS measurements were made after the 2001 earthquake.
GPS measurements in the north-east India
seem to indicate that there is strong lateral variation in the convergence
rates in north-east Himalayas.
The Measurements in Shillong plateau indicate that there was practically
no active deformation within the plateau during 2002-2003.
Convergence rates in Darjeeling-Sikkim Himalayas is 10-12mm/yr.