On the Impact of Geospace Weather on the Occurrence of M7.8/M7.5 Earthquakes on 6 February 2023 (Turkey), Possibly Associated with the Geomagnetic Storm of 7 November 2022

Authors

Dimitar Ouzounov, Chapman UniversityFollow
Galina Khachikyan, Institute of Seismology, AlmatyFollow

Document Type

Article

Publication Date

6-7-2024

Abstract

A joint analysis of solar wind, geomagnetic field, and earthquake catalog data showed that before the catastrophic M = 7.8 and M = 7.5 Kahramanmaras earthquake sequence on 6 February 2023, a closed strong magnetic storm occurred on 7 November 2022, SYM/H = −117 nT. The storm started at 08:04 UT. At this time, the high-latitudinal part of Turkey’s longitudinal region of future epicenters was located under the polar cusp, where the solar wind plasma would directly access the Earth’s environment. The time delay between storm onset and earthquake occurrence was ~91 days. We analyzed all seven strong (M7+) earthquakes from 1967 to 2020 to verify the initial findings. A similar pattern has been revealed for all events. The time delay between magnetic storm onset and earthquake occurrence varies from days to months. To continue these investigations, a retrospective analysis of seismic and other geophysical parameters just after preceded geomagnetic storms in the epicenter areas is desirable.

Comments

This article was originally published in Geosciences, volume 14, issue 6, in 2024. https://doi.org/10.3390/geosciences14060159

Recommended Citation

Ouzounov, D.; Khachikyan, G. On the Impact of Geospace Weather on the Occurrence of M7.8/M7.5 Earthquakes on 6 February 2023 (Turkey), Possibly Associated with the Geomagnetic Storm of 7 November 2022. Geosciences 2024, 14, 159. https://doi.org/10.3390/geosciences14060159

Peer Reviewed

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This work is licensed under a Creative Commons Attribution 4.0 License.