Local seismicity type of Kuwait revealing tectonic and anthropogenic characteristics

IF 1.6 4区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS
Abd el-aziz Khairy Abd el-aal, Farah Al-Jeri, Abdullah Al-Enezi, Hamada Saadalla
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Abstract

This work investigates the characteristics of local seismicity within the State of Kuwait and discusses its potential tectonic and anthropogenic drivers. As Kuwait is an oil-producing country, the occurrence of earthquakes simultaneously with oil extraction may suggest a case of triggered or induced seismicity. Seismic activity inside Kuwait is monitored with high accuracy and continuously after the establishment of the Kuwait National Seismic Network (KNSN) in 1997 through an ambitious plan to study the micro-earthquake activity in Kuwait. This network recorded more than 1378 micro/minor local earthquakes. Two seismogenic areas are identified, both characterized by weak magnitudes and shallow focal depths. In the current work, several modern geophysical techniques are performed including earthquake location, waveform-based moment tensor inversion, moment tensor decomposition, stress drop analysis, and stress pattern assessment. The results suggest that local earthquakes in Kuwait involve tectonic and anthropogenic components. Further densification of the network may allow a robust discrimination in the future.

Abstract Image

揭示构造和人为特征的科威特地方地震类型
这项研究调查了科威特国当地地震的特点,并讨论了其潜在的构造和人为驱动因素。由于科威特是一个产油国,在开采石油的同时发生地震可能表明存在触发或诱发地震的情况。1997 年,通过一项研究科威特微型地震活动的宏伟计划,科威特国家地震网络 (KNSN)成立,此后,科威特境内的地震活动得到了高精度和持续的监测。该网络记录了超过 1378 次微/小地方地震。确定了两个地震活动区,其特点是震级弱、震源深度浅。在当前工作中,采用了几种现代地球物理技术,包括地震定位、基于波形的力矩张量反演、力矩张量分解、应力降分析和应力模式评估。结果表明,科威特的局部地震涉及构造和人为因素。进一步增加网络的密度可在未来进行可靠的判别。
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来源期刊
Journal of Seismology
Journal of Seismology 地学-地球化学与地球物理
CiteScore
3.30
自引率
6.20%
发文量
67
审稿时长
3 months
期刊介绍: Journal of Seismology is an international journal specialising in all observational and theoretical aspects related to earthquake occurrence. Research topics may cover: seismotectonics, seismicity, historical seismicity, seismic source physics, strong ground motion studies, seismic hazard or risk, engineering seismology, physics of fault systems, triggered and induced seismicity, mining seismology, volcano seismology, earthquake prediction, structural investigations ranging from local to regional and global studies with a particular focus on passive experiments.
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