Study on Dynamic triggering in Arunachal, Himalaya
Abstract
The study of dynamic triggering is carried out in many parts of the world followed by large far away earthquake. Limited cases of dynamic triggering found in the Himalayan region, e.g., Kumaon Himalayas and Tibetan plateau in a continental-continental collision zone. Here we conducted a systematic search for dynamic triggering from a close network of 32 stations in Arunachal, Himalaya. We studied 29 recent large earthquakes since 2010 who generated dynamic stresses of at least 1kPa in the region. We find positive cases of dynamic triggering during April 6, 2010, Mw7.8 Sumatra earthquake and June 12, 2010, Mw7.7 Nicobar island earthquake. Tohoku earthquakes,2011 and Indian Ocean earthquake, 2012 generated high dynamic stresses of 80 kPa and 60 kPa but did not triggered the seismicity in the region. The triggering found in the form of microearthquake and tremors mostly during the tail of large amplitude surface waves. However, we didn't locate these triggered events because recording at one or two stations. The triggered stations are close to the Himalayan Frontal Thrust (HFT), therefore, these triggered event are of tectonic origin.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFM.S41E0596B
- Keywords:
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- 7209 Earthquake dynamics;
- SEISMOLOGYDE: 7223 Earthquake interaction;
- forecasting;
- and prediction;
- SEISMOLOGYDE: 7230 Seismicity and tectonics;
- SEISMOLOGYDE: 7240 Subduction zones;
- SEISMOLOGY