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© 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

An earthquake is a seismic event resulting from a sudden release of energy in the lithosphere, which produces waves that can propagate through the atmosphere into the ionosphere, causing ionospheric disturbances, and excites an additional electric field in the lower ionosphere. Two large-scale traveling ionospheric disturbances (LSTIDs) at daytime Turkey longitudes were found, with phase speeds of 534 and 305 m/s, respectively, after the second strong earthquake at 10:24 UT on 6 February 2023. During strong earthquakes, the equatorial ionospheric currents including the E-region equatorial electrojet (EEJ) and F-region ionospheric radial current (IRC) might be perturbed. At the Tatuoca station in Brazil, we observed a stronger-than-usual horizontal magnetic field associated with the EEJ, with a magnitude of ~100 nT. EEJ perturbations are mainly controlled by neutral winds, especially zonal winds. In the equatorial F-region, a wave perturbation of the IRC was caused by a balance of the electric field generated by the zonal winds at ~15° MLat, the F-region local winds driven by atmospheric resonance, and the additional polarization electric field. Our findings better the understanding of the complex interplay between seismic events and ionospheric current disturbances.

Details

Title
The Turkey Earthquake Induced Equatorial Ionospheric Current Disturbances on 6 February 2023
Author
Zhang, Kedeng 1   VIAFID ORCID Logo  ; Wang, Hui 2   VIAFID ORCID Logo  ; Xia, Hao 2 ; Wang, Wenbin 3 ; Liu, Jing 4   VIAFID ORCID Logo  ; Zhang, Shunrong 5 ; Jin, Yaqi 6 

 Department of Space Physics, School of Electronic Information, Hubei Luojia Laboratory, Wuhan University, Wuhan 430072, China; [email protected] (K.Z.); [email protected] (H.X.); State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100190, China 
 Department of Space Physics, School of Electronic Information, Hubei Luojia Laboratory, Wuhan University, Wuhan 430072, China; [email protected] (K.Z.); [email protected] (H.X.) 
 High Altitude Observatory, National Center for Atmospheric Research, Boulder, CO 80301, USA; [email protected] 
 School of Space Science and Physics, Shandong University, Weihai 264209, China; [email protected] 
 Haystack Observatory, Massachusetts Institute of Technology, Westford, MA 01886, USA; [email protected] 
 Department of Physics, University of Oslo, P.O. Box 1048, Blindern, 0316 Oslo, Norway; [email protected] 
First page
272
Publication year
2024
Publication date
2024
Publisher
MDPI AG
e-ISSN
20724292
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2918797575
Copyright
© 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.