2023年印度东北部及其周边三次中地震的宏观地震研究及其环境影响

IF 1.827 Q2 Earth and Planetary Sciences
Drishya Girishbai, Arun Bhadran, Sandipan Das, Gaikungam Rongmei
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引用次数: 0

摘要

印度板块的东北部正在经历一个独特的地质环境;碰撞和俯冲等两个弧形造山带在极东北角交汇,形成东部合弯。在过去的200年里,这些板块边界引起了许多强烈和巨大的地震,随后的全面研究导致了现代地震学的诞生。2023年,发生了3次中震级浅源地震(1)2023年8月14日发生在孟加拉国的5.4级地震,深度16公里,(2)2023年10月2日发生在梅加拉亚邦北加罗山附近的5.2级地震,深度10公里,(3)2023年12月2日发生在孟加拉国Ramganj附近的5.6级地震,深度55公里,在印度东北部多地造成了大范围震动和小规模破坏。这些地震的等震线是利用200多个众包数据集和对该地区不同人口谱的实地调查编制的。这些地震造成(1)锡尔赫特断裂2.86%、(2)车当断裂19.70%、(3)戈马提断裂4.98%的破裂。这项研究强调了收集大量断层数据的重要性,以便了解不同构造框架下的当前构造,并为更好的减灾计划做准备。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Macroseismic studies of three moderate earthquakes of 2023 in and around the Northeastern region of India and their environmental impacts

The northeastern part of the Indian plate is undergoing a unique geological setting; two arcuated orogens such as collision And subduction meet in the extreme northeast corner to form the eastern syntaxial bend. Over the past 200 years, these plate boundaries have caused numerous strong And great earthquakes, and the comprehensive study that followed led to the creation of modern seismology. During 2023, three moderate magnitude earthquakes with shallow focus (1) A 5.4 M with 16 km depth on 14 August 2023 in Bangladesh, (2) A 5.2 M with depth of 10 km on 2 October 2023 near North Garo Hills, Meghalaya, and (3) 5.6 M with depth of 55 km on 2 December 2023 near Ramganj, Bangladesh, occurred And created a widespread shaking and small-scale damages in various parts of Northeast India. Isoseismal lines of these earthquakes have been prepared using more than 200 crowdsource datasets and field survey in the different demographic spectrum of the area. These earthquakes have caused rupture of (1) 2.86% in Sylhet fault, (2) 19.70% in Cherdang fault, and (3) 4.98% in Gomati fault. This study highlights the significance of collecting extensive data on numerous faults in order to comprehend the current tectonics in various tectonic frameworks and to prepare for a better mitigation plan.

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来源期刊
Arabian Journal of Geosciences
Arabian Journal of Geosciences GEOSCIENCES, MULTIDISCIPLINARY-
自引率
0.00%
发文量
1587
审稿时长
6.7 months
期刊介绍: The Arabian Journal of Geosciences is the official journal of the Saudi Society for Geosciences and publishes peer-reviewed original and review articles on the entire range of Earth Science themes, focused on, but not limited to, those that have regional significance to the Middle East and the Euro-Mediterranean Zone. Key topics therefore include; geology, hydrogeology, earth system science, petroleum sciences, geophysics, seismology and crustal structures, tectonics, sedimentology, palaeontology, metamorphic and igneous petrology, natural hazards, environmental sciences and sustainable development, geoarchaeology, geomorphology, paleo-environment studies, oceanography, atmospheric sciences, GIS and remote sensing, geodesy, mineralogy, volcanology, geochemistry and metallogenesis.
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