г. Москва и Московская область, Россия
г. Москва и Московская область, Россия
г. Москва и Московская область, Россия
г. Москва и Московская область, Россия
г. Москва и Московская область, Россия
ВАК 1.6 Науки о Земле и окружающей среде
УДК 528.88 Применение дистанционного зондирования
УДК 55 Геология. Геологические и геофизические науки
УДК 550.34 Сейсмология
УДК 550.383 Главное магнитное поле Земли
ГРНТИ 89.57 Исследования Земли из космоса
ГРНТИ 37.01 Общие вопросы геофизики
ГРНТИ 37.15 Геомагнетизм и высокие слои атмосферы
ГРНТИ 37.25 Океанология
ГРНТИ 37.31 Физика Земли
ГРНТИ 38.01 Общие вопросы геологии
ГРНТИ 36.00 ГЕОДЕЗИЯ. КАРТОГРАФИЯ
ГРНТИ 37.00 ГЕОФИЗИКА
ГРНТИ 38.00 ГЕОЛОГИЯ
ГРНТИ 39.00 ГЕОГРАФИЯ
ГРНТИ 52.00 ГОРНОЕ ДЕЛО
ОКСО 05.06.01 Науки о Земле
ББК 26 Науки о Земле
ТБК 63 Науки о Земле. Экология
BISAC SCI SCIENCE
Changes in the altitude profiles of the ionospheric electron density (Ne) and the total electron content (TEC) were detected using satellite navigation system data during the preparation and occurrence of a powerful M8.8 earthquake (July 29, 2025, UTC) and other strong earthquakes of M ≥ 6 that occurred near the Kamchatka Peninsula in June–September 2025. A 9–18% decrease in the ionospheric electron density was detected, occurred 1–5 days before the M8.8 earthquake. A gradual decrease in the total electron content (TEC) began 3 months before the earthquake, ceasing 15 days before the event. Using the Long Short-Term Memory and Autoencoder neural networks, anomalies were identified in the time series of normalized values of the total electron content (NTEC) of the ionosphere during the preparation of earthquakes of M ≥ 6 that occurred in June–September 2025 near the Kamchatka Peninsula. The pattern of the anomalous variations in ionospheric parameters identified in this research corresponds to the characteristics of ionospheric anomalies during the preparation and occurrence of strong seismic events presented in earlier works.
Remote sensing, ionospheric electron density, total electron content, seismo-ionospheric coupling, ionospheric anomalies, Kamchatka megathrust earthquake
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