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Kundu, Bhaskar
- The 12 May 2015 Kodari Earthquake (Mw 7.3) in Central Nepal:Delayed Triggering by the 25 April 2015 Gorkha Earthquake (Mw 7.8)
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Authors
Affiliations
1 CSIR-National Geophysical Research Institute, Hyderabad 500 007, IN
2 Department of Earth and Atmospheric Sciences, National Institute of Technology Rourkela, Rourkela 769 008, IN
3 National Centre for Seismology, Ministry of Earth Sciences, New Delhi 110 003, IN
1 CSIR-National Geophysical Research Institute, Hyderabad 500 007, IN
2 Department of Earth and Atmospheric Sciences, National Institute of Technology Rourkela, Rourkela 769 008, IN
3 National Centre for Seismology, Ministry of Earth Sciences, New Delhi 110 003, IN
Source
Current Science, Vol 114, No 07 (2018), Pagination: 1534-1539Abstract
The 12 May 2015 earthquake of Mw 7.3 occurred in the Kodari region, Central Nepal, 17 days after the 25 April 2015 Gorkha earthquake (Mw 7.8) along the Himalayan plate boundary. Both the earthquakes were associated with predominantly thrust faulting on the Main Himalayan Thrust (MHT). This is the largest aftershock of the 2015 Gorkha earthquake which occurred approximately 150 km east of it. Our analysis suggests that the 2015 Gorkha earthquake significantly increased the Coulomb stress on the shallow unruptured and updip part of the MHT, further west of the 2015 rupture and also in the hypocentre region of 12 May 2015 Mw 7.3 aftershock. In the following 17 days period, Coulomb failure stress increased further by the relaxation of coseismic pore pressure on the eastern side of its coseismic rupture, where the 12 May 2015 aftershock had occurred.Keywords
Coseismic Rupture, Delayed Triggering, Earthquakes, Failure Stress, Thrust Faulting.Full Text
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- Non-Tectonic Signals in Tectonic Geodesy
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Authors
Affiliations
1 Department of Earth and Atmospheric Sciences, NIT Rourkela, Rourkela - 769008, IN
2 National Centre for Seismology, Ministry of Earth Sciences, New Delhi - 110003, IN
1 Department of Earth and Atmospheric Sciences, NIT Rourkela, Rourkela - 769008, IN
2 National Centre for Seismology, Ministry of Earth Sciences, New Delhi - 110003, IN
Source
Current Science, Vol 115, No 5 (2018), Pagination: 822-825Abstract
Earth’s gravitational field, its shape and orientation in the space are the ‘three pillars of geodesy’1,2. In recent times, geodesy has emerged as an interdisciplinary domain in geophysics, which includes tectonics, internal structure of the earth, seismology, hydrology, glaciology, oceanography, meteorology, atmospheric physics, climate science, etc.1. In fact, it has found several applications in earth sciences that a new subject ‘tectonic geodesy’ has evolved, which specifically deals with the application of geodetic techniques in understanding tectonic processes by estimating surface velocity field within tectonically active regions. This technique provides constraints on the spatio-temporal distribution of the lithospheric deformation and surface plate kinematics by exploiting various space-based geodetic techniques (e.g. Global Positioning System (GPS), Very Long Baseline Interferometry (VLBI), Interferometric Synthetic Aperture Radar (InSAR), Doppler Orbitography and Radio positioning Integrated by Satellite (DORIS) and Satellite Laser Ranging (SLR)).Full Text
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- Seamount Subduction and Rupture Characteristics of the March 11, 2011, Tohoku Earthquake
Abstract Views :214 |
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Authors
Affiliations
1 National Geophysical Research Institute (CSIR), Uppal Road, Hyderabad - 500 007, IN
1 National Geophysical Research Institute (CSIR), Uppal Road, Hyderabad - 500 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 79, No 3 (2012), Pagination: 245-251Abstract
We suggest that the spatial location of the 2011 Tohoku earthquake rupture and slip distribution on it was strongly influenced by the subduction of seamount chains. Subduction of seamounts across the Japan trench caused weak coupling on the plate interface which acted as barriers to the 2011 Tohoku earthquake rupture and thus delimited it.Keywords
Tohoku Earthquake, Seamounts, Coupling, Japan Trench.
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Authors
Affiliations
1 Department of Earth and Atmospheric Sciences, National Institute of Technology, Rourkela 769 008
2 CSIR-National Geophysical Research Institute, Hyderabad 500 007
1 Department of Earth and Atmospheric Sciences, National Institute of Technology, Rourkela 769 008
2 CSIR-National Geophysical Research Institute, Hyderabad 500 007
Source
Current Science, Vol 123, No 3 (2022), Pagination: 259-260Abstract
No Abstract.Full Text
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