Primary surface rupture of the 1950 Tibet-Assam great earthquake along the eastern Himalayan front, India

Abstract The pattern of strain accumulation and its release during earthquakes along the eastern Himalayan syntaxis is unclear due to its structural complexity and lack of primary surface signatures associated with large-to-great earthquakes. This led to a consensus that these earthquakes occurred o...

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Autores principales:	Rao Singh Priyanka, R. Jayangondaperumal, Arjun Pandey, Rajeeb Lochan Mishra, Ishwar Singh, Ravi Bhushan, Pradeep Srivastava, S. Ramachandran, Chinmay Shah, Sumita Kedia, Arun Kumar Sharma, Gulam Rasool Bhat
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b4ff0b2fd02944a2aff33931e45dc510
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spelling	oai:doaj.org-article:b4ff0b2fd02944a2aff33931e45dc5102021-12-02T11:52:24ZPrimary surface rupture of the 1950 Tibet-Assam great earthquake along the eastern Himalayan front, India10.1038/s41598-017-05644-y2045-2322https://doaj.org/article/b4ff0b2fd02944a2aff33931e45dc5102017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05644-yhttps://doaj.org/toc/2045-2322Abstract The pattern of strain accumulation and its release during earthquakes along the eastern Himalayan syntaxis is unclear due to its structural complexity and lack of primary surface signatures associated with large-to-great earthquakes. This led to a consensus that these earthquakes occurred on blind faults. Toward understanding this issue, palaeoseismic trenching was conducted across a ~3.1 m high fault scarp preserved along the mountain front at Pasighat (95.33°E, 28.07°N). Multi-proxy radiometric dating employed to the stratigraphic units and detrital charcoals obtained from the trench exposures provide chronological constraint on the discovered palaeoearthquake surface rupture clearly suggesting that the 15th August, 1950 Tibet-Assam earthquake (Mw ~ 8.6) did break the eastern Himalayan front producing a co-seismic slip of 5.5 ± 0.7 meters. This study corroborates the first instance in using post-bomb radiogenic isotopes to help identify an earthquake rupture.Rao Singh PriyankaR. JayangondaperumalArjun PandeyRajeeb Lochan MishraIshwar SinghRavi BhushanPradeep SrivastavaS. RamachandranChinmay ShahSumita KediaArun Kumar SharmaGulam Rasool BhatNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Rao Singh Priyanka R. Jayangondaperumal Arjun Pandey Rajeeb Lochan Mishra Ishwar Singh Ravi Bhushan Pradeep Srivastava S. Ramachandran Chinmay Shah Sumita Kedia Arun Kumar Sharma Gulam Rasool Bhat Primary surface rupture of the 1950 Tibet-Assam great earthquake along the eastern Himalayan front, India
description	Abstract The pattern of strain accumulation and its release during earthquakes along the eastern Himalayan syntaxis is unclear due to its structural complexity and lack of primary surface signatures associated with large-to-great earthquakes. This led to a consensus that these earthquakes occurred on blind faults. Toward understanding this issue, palaeoseismic trenching was conducted across a ~3.1 m high fault scarp preserved along the mountain front at Pasighat (95.33°E, 28.07°N). Multi-proxy radiometric dating employed to the stratigraphic units and detrital charcoals obtained from the trench exposures provide chronological constraint on the discovered palaeoearthquake surface rupture clearly suggesting that the 15th August, 1950 Tibet-Assam earthquake (Mw ~ 8.6) did break the eastern Himalayan front producing a co-seismic slip of 5.5 ± 0.7 meters. This study corroborates the first instance in using post-bomb radiogenic isotopes to help identify an earthquake rupture.
format	article
author	Rao Singh Priyanka R. Jayangondaperumal Arjun Pandey Rajeeb Lochan Mishra Ishwar Singh Ravi Bhushan Pradeep Srivastava S. Ramachandran Chinmay Shah Sumita Kedia Arun Kumar Sharma Gulam Rasool Bhat
author_facet	Rao Singh Priyanka R. Jayangondaperumal Arjun Pandey Rajeeb Lochan Mishra Ishwar Singh Ravi Bhushan Pradeep Srivastava S. Ramachandran Chinmay Shah Sumita Kedia Arun Kumar Sharma Gulam Rasool Bhat
author_sort	Rao Singh Priyanka
title	Primary surface rupture of the 1950 Tibet-Assam great earthquake along the eastern Himalayan front, India
title_short	Primary surface rupture of the 1950 Tibet-Assam great earthquake along the eastern Himalayan front, India
title_full	Primary surface rupture of the 1950 Tibet-Assam great earthquake along the eastern Himalayan front, India
title_fullStr	Primary surface rupture of the 1950 Tibet-Assam great earthquake along the eastern Himalayan front, India
title_full_unstemmed	Primary surface rupture of the 1950 Tibet-Assam great earthquake along the eastern Himalayan front, India
title_sort	primary surface rupture of the 1950 tibet-assam great earthquake along the eastern himalayan front, india
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/b4ff0b2fd02944a2aff33931e45dc510
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Primary surface rupture of the 1950 Tibet-Assam great earthquake along the eastern Himalayan front, India

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