Introduction: the deformation of continental crust and Mike Coward's impact on its understanding

Butler, Robert W.; Graham, Rod; Ries, A. C.

doi:10.1144/gsl.sp.2007.272.01.01

Cited by 1 publication

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References 48 publications

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“…The Himalaya, the youngest and the highest mountain range in the world is resulted from the collision of the Indian and Eurasian plates (Bilham, 2019;Wang and Fialko, 2015). After the collision, subsequent thrusting of Indian plate into the Eurasian plate led to the formation of the Himalaya range and the largest and highest plateau -Tibetan plateau (Butler et al, 2007;DeCelles et al, 2014;Ni, 1989;Pandey et al, 1995). The mechanism of the formation of the Himalaya is that at some point between 65 Ma (million years ago) and 45Ma, India collided with Eurasia creating the Indus Yarlung Suture (IYS) -a zone that delineates the approximate boundary between the Indian and Eurasian plate.…”

Section: Tectonics Of the Himalayamentioning

confidence: 99%

Statistics of the earthquakes in the central Himalaya and its vicinity in last 56 years, with an emphasis in the 25 April 2015 Gorkha, Nepal earthquake

Tiwari

Paudyal

2021

Contrib. Geophys. Geod.

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To understand the variation of stress levels in the region 80°E – 89°E and 26°N – 31°N, the statistical analysis of earthquake frequency-magnitude distribution and spatio-temporal variation of fractal correlation dimension of earthquake epicenter distribution are estimated. The analysis is carried out on declusterised catalogue containing 1185 events of 56 years from February 1964 to November 2020. The study area is divided into three regions the western Nepal and vicinity (Region A), central Nepal and vicinity (Region B) and eastern Nepal and vicinity (Region C), respectively. The magnitude of completeness (Mc) varies from 3.6 to 4.0 for the study period. The spatial fractal dimension (Dc) and b-value are calculated as 1.89 ± 0.02 and 0.68 ± 0.03 for the western Nepal, 1.76 ± 0.01 and 0.60 ± 0.05 for the central Nepal, whereas they are estimated as 1.85 ± 0.02 and 0.63 ± 0.03 for the eastern part of the Nepal. The b-values obtained for all three regions are very low comparing to global average value of 1. The time clustering of the events in the respective regions are 0.26 ± 0.003, 0.31 ± 0.004 and 0.26 ± 0.02 as indicated by temporal fractal dimension (Dt). The higher Dc, lower b and Dt values associated with the regions indicate high stress concentration and stronger epicenter clustering in these regions. The strongly increasing trend of fractal dimension and strongly decreasing trend of b-value show the high probabilities of occurring the large earthquake in both central Nepal (82.5°E – 85.5°E and 27.5°N – 30°N) and eastern Nepal (85.5°E – 88.2°E and 26.45°N – 28.6°N) as compared to western Nepal (80°E – 82.5°E and 28°N – 30.5°N). This statistical analysis of spatial and temporal characteristics of the earthquake activity may give significant signs of the future seismic hazard along central Himalaya region.

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