Seismo-ionospheric anomalies related to the M-w 6.6, July 20, 2017, earthquake in Bodrum, Turkey

0575665 - ASÚ 2025 RIV NL eng J - Článek v odborném periodiku
Eroglu, E. - Nane, E. - Göker, Ümit Deniz
Seismo-ionospheric anomalies related to the M-w 6.6, July 20, 2017, earthquake in Bodrum, Turkey.
Natural Hazards. Roč. 117, č. 2 (2023), s. 1521-1539. ISSN 0921-030X. E-ISSN 1573-0840
Institucionální podpora: RVO:67985815
Klíčová slova: Bodrum earthquake * total electron content * geomagnetic storm * solar activity
Impakt faktor: 3.7, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1007/s11069-023-05914-1

The Bodrum/Kos earthquake that occurred around the island of Kos (Greece) on July 20, 2017, caused serious uneasiness for the people of the region. The earthquake, which occurred 10 km away from Bodrum (36.929 degrees N-27.414 degrees E) at 22:31 UT and at a depth of 7 km, was reported with M-w 6.6. This paper examines the ionospheric anomalies by the means of the total electron content (TEC) map of 61 days. This work utilizes the GNSS-based time-domain TEC map. The TEC (TECU) map is interpolated with Bodrum, Turkey, locations at 35.000 degrees N-37.500 degrees N and 25.000 degrees E-30.000 degrees E. This problem presents a frequency-domain TEC map by exhibiting its amplitudes with Fourier transformation spectral analysis. Earthquakes, solar activities, and geomagnetic storms that can potentially reason anomalies are studied in this essay. The F10.7 (sfu) governs the solar activity effect. OMNI web space weather condition tools direct geomagnetic storms discussion. Statistical approach determines the TEC map boundaries. The TEC map out of the boundaries is marked as an anomaly. The paper detects 11-day TEC map anomalies (7 of these days are before the earthquake). As any space weather condition effect could not be detected, the anomalies on June 22 and 23 and July 1, 2, and 4 possibly are the precursors of the Bodrum/Kos event. The anomalies on July 8 and 15 are probably associated with the earthquake and geomagnetic storms. The source of the anomaly on days July 21 and August 3, 5, and 20 may be the aftershocks of the earthquake and geomagnetic storms.
Trvalý link: https://hdl.handle.net/11104/0353274