Abstract
The local seismicity observed by seismic network in siachen-nubra region during January 2010-December 2012 shows that the middle part of the crust (17 - 40 km) is aseismic. This aseismic layer (17 - 40 km) is sandwiched between two seismically active layers and depicts a good spatial correlation with the observations of low resistivity reported from magnetotelluric studies for the same region. The local seismicity shows a trend along the Karakoram fault and clustering of events in Shyok Suture zone and Karakoram shear zone. The moment magnitude of these events lies between 1.3 and 4.3. Most of these events have been originated in upper crust.
Highlights
The Himalayas, spanning length of 2500 km is a consequence of continent collision [1]-[3]
The Himalayan region is known for its high seismicity for small to large magnitude earthquakes
How to cite this paper: Parshad, R., Snehmani, Srivastva, P.K., Rani, R. and Ganju, A. (2015) Aseismic Layer Detected in the Mid-Crust of Nubra-Siachen Region, India Using Local Seismic Data
Summary
The Himalayas, spanning length of 2500 km is a consequence of continent collision [1]-[3]. The Himalayan region is known for its high seismicity for small to large magnitude earthquakes. Five large magnitude earthquakes have visited Himalayan region (2015) Aseismic Layer Detected in the Mid-Crust of Nubra-Siachen Region, India Using Local Seismic Data. R. Parshad et al system in North-West to Shyok-Nubra confluence in South East. Parshad et al system in North-West to Shyok-Nubra confluence in South East It covers 4381.23 sq km area and amassed of various litho units such as Karakorum plutonic complex, Ladakh Plutonic Complex, etc. Siachen glacier along with its tributaries covers more than 1500 sq kms This is the largest glacier in the Himalaya and second largest among the known glacier outside the polar and sub-polar regions. The hypocentral depth of the local events recorded at seismic stations is in the upper crust depth range 0 - 17 km and 40 - 75 km but few events are observed at the depth greater than 100 km in the mantle along the Karakorum fault
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