Modification of the ionosphere before the strong earthquake of january 13, 2007 with magnitude М = 8.1: An integrated approach
- Authors: Pulinets S.А.1, Hegai V.V.2, Legenka А.D.2, Korsunova L.P.2
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Affiliations:
- Space Research Institute of the Russian Academy of Sciences
- Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation
- Issue: Vol 65, No 2 (2025)
- Pages: 206-213
- Section: Articles
- URL: https://journal-vniispk.ru/0016-7940/article/view/292536
- DOI: https://doi.org/10.31857/S0016794025020061
- EDN: https://elibrary.ru/CXEAPW
- ID: 292536
Cite item
Abstract
A study was carried out of vertical sounding data collected by two ground-based vertical ionosondes Wakkanai and Kokubunji, situated within the preparation zone of an earthquake with a magnitude of M = 8.1, which occurred on January 13, 2007 at 04:23:21 UT east of Simushir Island and was the second of a sequence of two strong (M >8) earthquakes on November 15, 2006 and January 13, 2007, which were unique events in the seismic history of the Middle Kuril Islands. A comprehensive analysis of ionospheric data showed that 13-14 hours before this earthquake, specific anomalies in the E- and F-regions of the ionosphere were simultaneously observed over both ionospheric stations, which, with a high degree of probability, were its short-term ionospheric precursors. It is shown that additional consideration when analyzing ionospheric data of the behavior of the Barbier δ-parameter, constructed on their basis, significantly increases the correctness of identification of detected ionospheric earthquake precursors in complex situations.
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About the authors
S. А. Pulinets
Space Research Institute of the Russian Academy of Sciences
Author for correspondence.
Email: pulse@rssi.ru
Russian Federation, Moscow
V. V. Hegai
Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation
Email: hegai@izmiran.ru
Russian Federation, Moscow, Troitsk
А. D. Legenka
Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation
Email: hegai@izmiran.ru
Russian Federation, Moscow, Troitsk
L. P. Korsunova
Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation
Email: hegai@izmiran.ru
Russian Federation, Moscow, Troitsk
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