Evaluation of crustal deformation and associated strong motions induced by the 2022 Paktika earthquake, Afghanistan

IF 1.2 4区 地球科学 Q3 Earth and Planetary Sciences
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Abstract

The 2022 Paktika earthquake (moment magnitude: 6.2) occurred on June 22, 2022, near the border between the Khost and Paktika Provinces of Afghanistan, causing heavy damage and casualties in Paktika Province. This study evaluated the crustal deformation and associated strong motions induced by the Paktika earthquake. Crustal deformations were determined using the Differential Interferometric Synthetic Aperture Radar (DInSAR) technique and three-dimensional finite element method (3D-FEM) and the results were compared. The permanent ground displacements obtained from the DInSAR and 3D-FEM analyses were similar in terms of amplitude and areal distribution. Strong motions were estimated using the 3D-FEM with and without considering regional topography. The estimations of maximum ground acceleration, velocity, and permanent ground deformations were compared among each other as well as with those inferred from failures of some simple structures in the Spera and Gayan districts. The inferred maximum ground acceleration and velocity from the failed adobe structures were more than 300 Gal and 50 cm/s, respectively, nearly consistent with the estimates obtained using empirical methods. The empirical method yielded a maximum ground acceleration of 347 Gal, whereas the maximum ground velocity was approximately 50 cm/s. In light of these findings, some surface expressions of crustal deformations and strong ground motions, such as failures of soil and rock slopes and rockfalls, have been presented. The rock slope failures in the epicentral area were consistent with those observed during various earthquakes in Afghanistan and worldwide.
对 2022 年阿富汗帕克蒂卡地震诱发的地壳变形和相关强烈运动的评估
2022 年 6 月 22 日,阿富汗霍斯特省和帕克蒂卡省交界处附近发生了 2022 年帕克蒂卡地震(震级:6.2 级),给帕克蒂卡省造成了严重破坏和人员伤亡。本研究评估了帕克蒂卡地震引起的地壳变形和相关强烈运动。使用差分干涉合成孔径雷达(DInSAR)技术和三维有限元法(3D-FEM)确定了地壳变形,并对结果进行了比较。差分干涉合成孔径雷达和三维有限元法分析得出的永久地表位移在振幅和方圆分布上相似。在考虑和不考虑区域地形的情况下,使用三维有限元估算了强运动。对最大地面加速度、速度和永久地面变形的估算结果进行了相互比较,并与斯佩拉和加扬地区一些简单结构的破坏推断结果进行了比较。从倒塌的土坯结构中推断出的最大地面加速度和速度分别超过 300 Gal 和 50 cm/s,与使用经验方法得出的估计值基本一致。经验方法得出的最大地面加速度为 347 加仑,而最大地面速度约为 50 厘米/秒。根据这些研究结果,提出了地壳变形和强烈地面运动的一些表面表现形式,如土石斜坡崩塌和落石。震中地区的岩坡崩塌与在阿富汗和世界各地的各种地震中观察到的岩坡崩塌一致。
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来源期刊
Earthquake Science
Earthquake Science GEOCHEMISTRY & GEOPHYSICS-
CiteScore
1.10
自引率
8.30%
发文量
42
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.
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