25,000 Years long seismic cycle in a slow deforming continental region of Mongolia

Abstract The spatial distribution of large earthquakes in slowly deforming continental regions (SDCR) is poorly documented and, thus, has often been deemed to be random. Unlike in high strain regions, where seismic activity concentrates along major active faults, earthquakes in SDCR may seem to occu...

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Autores principales:	Laurent Bollinger, Yann Klinger, Steven L. Forman, Odonbaatar Chimed, Amgalan Bayasgalan, Ulziibat Munkhuu, Ganzorig Davaasuren, Tulga Dolgorsuren, Bayarsaikhan Enkhee, Demberel Sodnomsambuu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a26f8bda9980419fb6916f49462e7cc4
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spelling	oai:doaj.org-article:a26f8bda9980419fb6916f49462e7cc42021-12-02T14:58:47Z25,000 Years long seismic cycle in a slow deforming continental region of Mongolia10.1038/s41598-021-97167-w2045-2322https://doaj.org/article/a26f8bda9980419fb6916f49462e7cc42021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97167-whttps://doaj.org/toc/2045-2322Abstract The spatial distribution of large earthquakes in slowly deforming continental regions (SDCR) is poorly documented and, thus, has often been deemed to be random. Unlike in high strain regions, where seismic activity concentrates along major active faults, earthquakes in SDCR may seem to occur more erratically in space and time. This questions classical fault behavior models, posing paramount issues for seismic hazard assessment. Here, we investigate the M7, 1967, Mogod earthquake in Mongolia, a region recognized as a SDCR. Despite the absence of visible cumulative deformation at the ground surface, we found evidence for at least 3 surface rupturing earthquakes during the last 50,000 years, associated with a slip-rate of 0.06 ± 0.01 mm/year. These results show that in SDCR, like in faster deforming regions, deformation localizes on specific structures. However, the excessive length of return time for large earthquakes along these structures makes it more difficult to recognize earthquake series, and could conversely lead to the misconception that in SDCR earthquakes would be randomly located. Thus, our result emphasizes the need for systematic appraisal of the potential seismogenic structures in SDCR in order to lower the uncertainties associated with the seismogenic sources in seismic hazard models.Laurent BollingerYann KlingerSteven L. FormanOdonbaatar ChimedAmgalan BayasgalanUlziibat MunkhuuGanzorig DavaasurenTulga DolgorsurenBayarsaikhan EnkheeDemberel SodnomsambuuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Laurent Bollinger Yann Klinger Steven L. Forman Odonbaatar Chimed Amgalan Bayasgalan Ulziibat Munkhuu Ganzorig Davaasuren Tulga Dolgorsuren Bayarsaikhan Enkhee Demberel Sodnomsambuu 25,000 Years long seismic cycle in a slow deforming continental region of Mongolia
description	Abstract The spatial distribution of large earthquakes in slowly deforming continental regions (SDCR) is poorly documented and, thus, has often been deemed to be random. Unlike in high strain regions, where seismic activity concentrates along major active faults, earthquakes in SDCR may seem to occur more erratically in space and time. This questions classical fault behavior models, posing paramount issues for seismic hazard assessment. Here, we investigate the M7, 1967, Mogod earthquake in Mongolia, a region recognized as a SDCR. Despite the absence of visible cumulative deformation at the ground surface, we found evidence for at least 3 surface rupturing earthquakes during the last 50,000 years, associated with a slip-rate of 0.06 ± 0.01 mm/year. These results show that in SDCR, like in faster deforming regions, deformation localizes on specific structures. However, the excessive length of return time for large earthquakes along these structures makes it more difficult to recognize earthquake series, and could conversely lead to the misconception that in SDCR earthquakes would be randomly located. Thus, our result emphasizes the need for systematic appraisal of the potential seismogenic structures in SDCR in order to lower the uncertainties associated with the seismogenic sources in seismic hazard models.
format	article
author	Laurent Bollinger Yann Klinger Steven L. Forman Odonbaatar Chimed Amgalan Bayasgalan Ulziibat Munkhuu Ganzorig Davaasuren Tulga Dolgorsuren Bayarsaikhan Enkhee Demberel Sodnomsambuu
author_facet	Laurent Bollinger Yann Klinger Steven L. Forman Odonbaatar Chimed Amgalan Bayasgalan Ulziibat Munkhuu Ganzorig Davaasuren Tulga Dolgorsuren Bayarsaikhan Enkhee Demberel Sodnomsambuu
author_sort	Laurent Bollinger
title	25,000 Years long seismic cycle in a slow deforming continental region of Mongolia
title_short	25,000 Years long seismic cycle in a slow deforming continental region of Mongolia
title_full	25,000 Years long seismic cycle in a slow deforming continental region of Mongolia
title_fullStr	25,000 Years long seismic cycle in a slow deforming continental region of Mongolia
title_full_unstemmed	25,000 Years long seismic cycle in a slow deforming continental region of Mongolia
title_sort	25,000 years long seismic cycle in a slow deforming continental region of mongolia
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/a26f8bda9980419fb6916f49462e7cc4
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25,000 Years long seismic cycle in a slow deforming continental region of Mongolia

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