Ionospheric Response to the Seismic Wave Induced by the Kamchatka Earthquake on July 29, 2025

Aleksey Oinats; Mark Cedrik; Il&#039;ya Y. Dyukov; Aleksey Podlesnyi; Anastasiya Belinskaya; Aleksandra Borovko; Aleksandr Sorokin; Vasiliy Dobrynin; Petr A. Dergach

doi:10.2205/2026es001131

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IONOSPHERIC RESPONSE TO THE SEISMIC WAVE INDUCED BY THE KAMCHATKA EARTHQUAKE ON JULY 29, 2025 Ionospheric Response to the Seismic Wave Induced by the Kamchatka Earthquake on July 29, 2025

АА Аа

Published in Russian Journal of Earth Sciences · ELocator: ES2021 · Rubric: KAMCHATKA EARTHQUAKE M 8.8 ON JULY 29, 2025

DOI: https://doi.org/10.2205/2026es001131 · EDN: CYKDQR

Received: 02.02.2026 Accepted: 25.05.2026 Published: 01.07.2026 Language of publication: ENG

Authors

Aleksey Oinats

ORCID

Mark Cedrik

ORCID

Il'ya Y. Dyukov

ORCID

Aleksey Podlesnyi

ORCID

Anastasiya Belinskaya

ORCID

Aleksandra Borovko

ORCID

Aleksandr Sorokin

ORCID

Vasiliy Dobrynin

ORCID

Petr A. Dergach

ORCID

Aleksey Oinats

Academic degree: candidate of physical and mathematical sciences

Institute of Solar-Terrestrial Physics SB RAS Russian Federation · Irkutsk

ORCID

Mark Cedrik

Institute of Solar-Terrestrial Physics SB RAS Russian Federation · Irkutsk

ORCID

Il'ya Y. Dyukov

Institute of Solar-Terrestrial Physics SB RAS Russian Federation

ORCID

Aleksey Podlesnyi

Institute of Solar-Terrestrial Physics SB RAS Russian Federation · Irkutsk

ORCID

Anastasiya Belinskaya

Academic degree: candidate of physical and mathematical sciences

Trofimuk Institute of Petroleum Geology and Geophysics SB RAS Russian Federation · Novosibirsk

ORCID

Aleksandra Borovko

Trofimuk Institute of Petroleum Geology and Geophysics SB RAS Russian Federation

ORCID

Aleksandr Sorokin

Academic degree: candidate of physical and mathematical sciences

Institute of Solar Terrestrial Physics SB RAS Russian Federation · Irkutsk

ORCID

Vasiliy Dobrynin

Institute of Solar-Terrestrial Physics SB RAS Russian Federation · Irkutsk

ORCID

Petr A. Dergach

Trofimuk Institute of Petroleum Geology and Geophysics SB RAS Russian Federation

ORCID

ABSTRACT

The July 29, 2025 earthquake near the eastern coast of the Kamchatka Peninsula induced a high-amplitude seismic wave that propagated thousands of kilometers from the epicenter. Ground vibrations caused variations in surface air pressure with periods in the infrasonic range, which propagated almost vertically into the upper atmosphere and modulated the ionospheric plasma. The resulting ionospheric disturbances were, in turn, recorded by a number of radiophysical facilities monitoring the ionosphere. In this paper, we provide an overview of the effects caused by the passage of the seismic wave, which were observed during ionospheric monitoring using vertical, oblique, and sky-wave backscatter sounding techniques in the Asian part of Russia.

KEYWORDS

Lithosphere-atmosphere-ionosphere coupling, ionosphere monitoring, vertical sounding, oblique sounding, sky-wave backscatter sounding, HF radar, infrasound, Kamchatka megathrust earthquake

Funding

This study was supported by the Ministry of Science and Higher Education of the Russian Federation (projects FWSE-2026-0003, FWZZ-2026-0051, and FWZZ-2026-0052). The results were obtained using the Core Shared Research Facility “Angara” of ISTP SB RAS (https://ckp-rf.ru/catalog/ckp/3056/).

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GOST

Oinats A. V., Cedrik M. V., Dyukov I. Y., Podlesnyi A. V., Belinskaya A. Y., Borovko A. A., Sorokin A. G., Dobrynin V. A., Dergach P. A. Ionospheric Response to the Seismic Wave Induced by the Kamchatka Earthquake on July 29, 2025 // Russian Journal of Earth Sciences. 2026. no. 2. ES2021. DOI: https://doi.org/10.2205/2026es001131. EDN: CYKDQR. (Date of access 09.09.2026).

MLA

Aleksey Oinats, Cedrik M. V., Dyukov I. Y., Podlesnyi A. V., Belinskaya A. Y., Borovko A. A., Sorokin A. G., Dobrynin V. A., Dergach P. A.. "Ionospheric Response to the Seismic Wave Induced by the Kamchatka Earthquake on July 29, 2025." Russian Journal of Earth Sciences 26.2 (2026): ES2021. DOI: https://doi.org/10.2205/2026es001131. EDN: CYKDQR.

APA

Oinats A. V., Cedrik M. V., Dyukov I. Y., Podlesnyi A. V., Belinskaya A. Y., Borovko A. A., Sorokin A. G., Dobrynin V. A., Dergach P. A. (2026). Ionospheric Response to the Seismic Wave Induced by the Kamchatka Earthquake on July 29, 2025. Russian Journal of Earth Sciences, 26(2), ES2021. https://doi.org/10.2205/2026es001131 EDN: CYKDQR.

Chicago

Aleksey Oinats, Cedrik M. V., Dyukov I. Y., Podlesnyi A. V., Belinskaya A. Y., Borovko A. A., Sorokin A. G., Dobrynin V. A., Dergach P. A.. "Ionospheric Response to the Seismic Wave Induced by the Kamchatka Earthquake on July 29, 2025." Russian Journal of Earth Sciences 26, no. 2 (2026): ES2021. https://doi.org/10.2205/2026es001131. EDN: CYKDQR.

WIKI

{{cite journal | author = Oinats A. V., Cedrik M. V., Dyukov I. Y., Podlesnyi A. V., Belinskaya A. Y., Borovko A. A., Sorokin A. G., Dobrynin V. A., Dergach P. A. | title = Ionospheric Response to the Seismic Wave Induced by the Kamchatka Earthquake on July 29, 2025 | journal = Russian Journal of Earth Sciences | year = 2026 | volume = 26 | issue = 2 | pages = ES2021 | doi = 10.2205/2026es001131 }} EDN: CYKDQR

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IONOSPHERIC RESPONSE TO THE SEISMIC WAVE INDUCED BY THE KAMCHATKA EARTHQUAKE ON JULY 29, 2025 Ionospheric Response to the Seismic Wave Induced by the Kamchatka Earthquake on July 29, 2025

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