电离层总电子含量(TEC)异常作为地震前兆:揭示导致2023年摩洛哥6.8 Mw地震的地球物理联系

IF 2.4 Q2 GEOSCIENCES, MULTIDISCIPLINARY
Karan Nayak, Charbeth López-Urías, Rosendo Romero-Andrade, Gopal Sharma, German Michel Guzmán-Acevedo, Manuel Edwiges Trejo-Soto
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引用次数: 0

摘要

该研究深入研究了电离层总电子含量(TEC)异常与地震活动之间的关系,重点研究了摩洛哥2023年9月8日发生的6.8兆瓦地震,该地震位于非洲板块和欧亚板块交汇的构造活跃区域。为了提高研究结果的可靠性,我们结合了空间天气条件,利用指数(Dst、Kp和F10.7)来确定稳定空间天气的时期。这最大限度地减少了将自然电离层波动归因于地震事件的错误可能性。值得注意的是,我们的TEC分析揭示了正异常和负异常,其中一些发生在地震前一周。这些超过预定阈值的异常提供了与典型电离层条件显著偏离的有力证据。利用来自多个全球导航卫星系统(GNSS)站点的特定站点vTEC数据和伪随机噪声代码(prn)的空间制图技术突出了电离层异常与地震震中之间的强烈相关性。prn的整合提高了覆盖范围和对细微异常的敏感性。此外,利用Sentinel-1对卫星图像和地面位移数据的分析证实,地震发生后,地面隆起了约15厘米,这有助于了解地表对地震事件的反应。这些发现强调了电离层科学在推进地震预警系统和加深我们对地震前兆的理解方面的潜力,从而有助于减轻地震事件的影响,保护生命和基础设施。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Ionospheric Total Electron Content (TEC) Anomalies as Earthquake Precursors: Unveiling the Geophysical Connection Leading to the 2023 Moroccan 6.8 Mw Earthquake
The study delves into the relationship between ionospheric total electron content (TEC) anomalies and seismic activity, with a focus on Morocco’s 6.8 Mw earthquake on 8 September 2023, lying within a tectonically active region at the convergence of the African and Eurasian Plates. To enhance the reliability of our findings, we incorporate space weather conditions, utilizing indices (Dst, Kp, and F10.7) to pinpoint periods of stable space weather. This minimizes the possibility of erroneously attributing natural ionospheric fluctuations to seismic events. Notably, our TEC analysis unveils positive and negative anomalies, with some occurring up to a week before the earthquake. These anomalies, exceeding predefined thresholds, provide compelling evidence of significant deviations from typical ionospheric conditions. Spatial mapping techniques employing both station-specific vTEC data and pseudorandom noise codes (PRNs) from multiple global navigation satellite system (GNSS) stations highlight a strong correlation between ionospheric anomalies and the earthquake’s epicenter. The integration of PRNs enhances coverage and sensitivity to subtle anomalies. Additionally, the analysis of satellite imagery and ground displacement data using Sentinel-1 confirms significant ground uplift of approximately 15 cm following the earthquake, shedding light on surface responses to seismic events. These findings underscore the potential of ionospheric science in advancing earthquake early warning systems and deepening our understanding of earthquake precursors, thus contributing to the mitigation of seismic event impacts and the protection of lives and infrastructure.
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来源期刊
Geosciences (Switzerland)
Geosciences (Switzerland) Earth and Planetary Sciences-Earth and Planetary Sciences (all)
CiteScore
5.30
自引率
7.40%
发文量
395
审稿时长
11 weeks
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