Fractal analysis of major faults and fractal dimension of lineaments in the Indo-Gangetic Plain on a regional scale

IF 1.2 4区地球科学 Q3 Earth and Planetary Sciences

Earthquake Science Pub Date : 2024-02-29 DOI:10.1016/j.eqs.2024.01.015

Vipin Chauhan, Jagabandhu Dixit

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Abstract

The Indo-Gangetic Plain (IGP) is one of the most seismically vulnerable areas due to its proximity to the Himalayas. Geographic information system (GIS)-based seismic characterization of the IGP was performed based on the degree of deformation and fractal dimension. The zone between the Main Boundary Thrust (MBT) and the Main Central Thrust (MCT) in the Himalayan Mountain Range (HMR) experienced large variations in earthquake magnitude, which were identified by Number-Size (NS) fractal modeling. The central IGP zone experienced only moderate to low mainshock levels. Fractal analysis of earthquake epicenters reveals a large scattering of earthquake epicenters in the HMR and central IGP zones. Similarly, the fault fractal analysis identifies the HMR, central IGP, and south-western IGP zones as having more faults. Overall, the seismicity of the study region is strong in the central IGP, south-western IGP, and HMR zones, moderate in the western and southern IGP, and low in the northern, eastern, and south-eastern IGP zones.

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印度洋-甘地平原主要断层的分形分析和区域尺度线形的分形维度

印度洋-恒河平原（IGP）毗邻喜马拉雅山脉，是最容易发生地震的地区之一。根据变形程度和分形维度，对印度洋-甘地平原进行了基于地理信息系统（GIS）的地震特征描述。喜马拉雅山脉（HMR）的主边界推力（MBT）和主中央推力（MCT）之间的区域经历了巨大的震级变化，这些变化是通过数量-尺寸（NS）分形建模确定的。IGP 中心地带仅经历了中等至较低的主震级别。对地震震中的分形分析表明，HMR 和 IGP 中心区的地震震中非常分散。同样，断层分形分析表明，HMR、IGP 中部和 IGP 西南部地带的断层较多。总体而言，研究区域的地震活动性在 IGP 中部、IGP 西南部和 HMR 区较强，在 IGP 西部和南部中等，在 IGP 北部、东部和东南部较低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Earthquake Science GEOCHEMISTRY & GEOPHYSICS-

CiteScore

1.10

自引率

8.30%

发文量

审稿时长

3 months

期刊介绍： Earthquake Science (EQS) aims to publish high-quality, original, peer-reviewed articles on earthquake-related research subjects. It is an English international journal sponsored by the Seismological Society of China and the Institute of Geophysics, China Earthquake Administration. The topics include, but not limited to, the following ● Seismic sources of all kinds. ● Earth structure at all scales. ● Seismotectonics. ● New methods and theoretical seismology. ● Strong ground motion. ● Seismic phenomena of all kinds. ● Seismic hazards, earthquake forecasting and prediction. ● Seismic instrumentation. ● Significant recent or past seismic events. ● Documentation of recent seismic events or important observations. ● Descriptions of field deployments, new methods, and available software tools. The types of manuscripts include the following. There is no length requirement, except for the Short Notes. 【Articles】 Original contributions that have not been published elsewhere. 【Short Notes】 Short papers of recent events or topics that warrant rapid peer reviews and publications. Limited to 4 publication pages. 【Rapid Communications】 Significant contributions that warrant rapid peer reviews and publications. 【Review Articles】Review articles are by invitation only. Please contact the editorial office and editors for possible proposals. 【Toolboxes】 Descriptions of novel numerical methods and associated computer codes. 【Data Products】 Documentation of datasets of various kinds that are interested to the community and available for open access (field data, processed data, synthetic data, or models). 【Opinions】Views on important topics and future directions in earthquake science. 【Comments and Replies】Commentaries on a recently published EQS paper is welcome. The authors of the paper commented will be invited to reply. Both the Comment and the Reply are subject to peer review.