Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 114798 10.2205/2026es001116 edeybe KAMCHATKA EARTHQUAKE M 8.8 ON JULY 29, 2025 KAMCHATKA EARTHQUAKE M 8.8 ON JULY 29, 2025 KAMCHATKA EARTHQUAKE M 8.8 ON JULY 29, 2025 The July 29, 2025 Kamchatka Earthquake, MW 8.9: Examination Based on Regional Data Through End-2025 The July 29, 2025 Kamchatka Earthquake, MW 8.9: Examination Based on Regional Data Through End-2025 https://orcid.org/0000-0002-4019-4204 Чебров Данила Викторович Chebrov Danila Viktorovich https://orcid.org/0000-0001-8546-8822 Матвеенко Евгений Александрович Matveenko Evgeniy Aleksandrovich https://orcid.org/0000-0002-0036-802X Абубакиров Искандер Радиевич Abubakirov Iskander Radievich https://orcid.org/0000-0001-8209-3842 Дрознин Дмитрий Валериевич Droznin Dmitriy Valer'evich https://orcid.org/0000-0003-2358-5999 Дрознина Светлана Ярослававна Droznina Svetlana Yaroslavavna https://orcid.org/0009-0001-1887-9274 Ландер Александр Викторович Lander Aleksandr Viktorovich https://orcid.org/0000-0003-1136-6537 Митюшкина Светлана Владимировна Mityushkina Svetlana Vladimirovna Павлов Виктор Михайлович Pavlov Viktor Mihaylovich https://orcid.org/0000-0001-9513-9803 Раевская Анна Александровна Raevskaya Anna Aleksandrovna raevs@emsd.ru https://orcid.org/0000-0002-7378-9095 Сенюков Сергей Львович Senyukov Sergey L'vovich https://orcid.org/0000-0003-3518-9301 Титков Николай Николаевич Titkov Nikolay Nikolaevich Камчатский филиал Федерального исследовательского центра "Единая Геофизическая служба РАН" Россия Kamchatka Branch of the Geophysical Survey of the Russian Academy of Sciences Russian Federation Камчатский филиал Федерального исследовательского центра "Единая Геофизическая служба РАН" Россия Kamchatka Branch of the Geophysical Survey of the Russian Academy of Sciences Russian Federation Камчатский филиал Федерального исследовательского центра "Единая Геофизическая служба РАН" Россия Kamchatka Branch of the Geophysical Survey of the Russian Academy of Sciences Russian Federation Камчатский филиал Федерального исследовательского центра "Единая Геофизическая служба РАН" Россия Kamchatka Branch of the Geophysical Survey of the Russian Academy of Sciences Russian Federation Камчатский филиал Федерального исследовательского центра "Единая Геофизическая служба РАН" Россия Kamchatka Branch of the Geophysical Survey of the Russian Academy of Sciences Russian Federation Институт теории прогноза землетрясений и математической геофизики Российской академии наук Россия Institute for Earthquake Prediction Theory and Mathematical Geophysics of the Russian Academy of Sciences Russian Federation Камчатский филиал Федерального исследовательского центра "Единая Геофизическая служба РАН" Россия Kamchatka Branch of the Geophysical Survey of the Russian Academy of Sciences Russian Federation Камчатский филиал Федерального исследовательского центра "Единая Геофизическая служба РАН" Россия Kamchatka Branch of the Geophysical Survey of the Russian Academy of Sciences Russian Federation Камчатский филиал Федерального исследовательского центра "Единая Геофизическая служба РАН" Россия Kamchatka Branch of the Geophysical Survey of the Russian Academy of Sciences Russian Federation Камчатский филиал Федерального исследовательского центра "Единая Геофизическая служба РАН" Россия Kamchatka Branch of the Geophysical Survey of the Russian Academy of Sciences Russian Federation Камчатский филиал Федерального исследовательского центра "Единая Геофизическая служба РАН" Россия Kamchatka Branch of the Geophysical Survey of the Russian Academy of Sciences Russian Federation 01 07 2026 01 07 2026 26 2 ES2006 02 02 2026 25 05 2026 https://rjes.ru/en/nauka/article/114798/view

This article presents data on the MW 8.9 Kamchatka earthquake of July 29, 2025, compiled by the Kamchatka Branch of the Geophysical Survey of the Russian Academy of Sciences (KB GS RAS) as of December 31, 2025. The Kamchatka earthquake is one of the largest seismic events in the history of instrumental observations. To date it ranks as the sixth most powerful event ever recorded in the world. The rupture zone, estimated based on the aftershock area, is 580 × 180 km and roughly coincides with the source area of the Great Kamchatka Earthquake of November 4, 1952 (MW 9.0). The 73-year gap between these two megathrust earthquakes that occurred approximately in the same area is significantly shorter than what would be expected from the widely accepted concepts of the seismic cycle. The article provides information on source parameters of the main shock, the operation of the Tsunami Warning Service, a catalog of aftershock mechanisms, the characteristics of strong ground motions caused by the main shock, and a brief description of the manifestation of a tsunami. A preliminary assessment of the macroseismic impact of the Kamchatka earthquake and its aftershocks revealed that the earthquake caused shaking of intensity 7–8 on the SIS-17 scale in Severo-Kurilsk and 6–7 in Petropavlovsk-Kamchatsky; no human casualties or serious damage caused by the earthquake and tsunami were recorded throughout the entire area of their propagation. Features of the source process development revealed by the results of the analysis of the diurnal variation of seismic energy released after the main event are discussed. The finite fault slip model of the earthquake based on the coseismic displacements from GNSS observations is presented.

This article presents data on the MW 8.9 Kamchatka earthquake of July 29, 2025, compiled by the Kamchatka Branch of the Geophysical Survey of the Russian Academy of Sciences (KB GS RAS) as of December 31, 2025. The Kamchatka earthquake is one of the largest seismic events in the history of instrumental observations. To date it ranks as the sixth most powerful event ever recorded in the world. The rupture zone, estimated based on the aftershock area, is 580 × 180 km and roughly coincides with the source area of the Great Kamchatka Earthquake of November 4, 1952 (MW 9.0). The 73-year gap between these two megathrust earthquakes that occurred approximately in the same area is significantly shorter than what would be expected from the widely accepted concepts of the seismic cycle. The article provides information on source parameters of the main shock, the operation of the Tsunami Warning Service, a catalog of aftershock mechanisms, the characteristics of strong ground motions caused by the main shock, and a brief description of the manifestation of a tsunami. A preliminary assessment of the macroseismic impact of the Kamchatka earthquake and its aftershocks revealed that the earthquake caused shaking of intensity 7–8 on the SIS-17 scale in Severo-Kurilsk and 6–7 in Petropavlovsk-Kamchatsky; no human casualties or serious damage caused by the earthquake and tsunami were recorded throughout the entire area of their propagation. Features of the source process development revealed by the results of the analysis of the diurnal variation of seismic energy released after the main event are discussed. The finite fault slip model of the earthquake based on the coseismic displacements from GNSS observations is presented.

 Kamchatka strongest earthquakes seismic focal zone aftershocks focal mechanism macroseismics tsunami Kamchatka megathrust earthquake Kamchatka strongest earthquakes seismic focal zone aftershocks focal mechanism macroseismics tsunami Kamchatka megathrust earthquake This work was supported by the Ministry of Science and Higher Education of the Russian Federation through state assignments Nos. 124020900029-7 and 075-00609-26. The data used in the work were obtained with large-scale research facilities “Seismic Infrasound Array for Monitoring of the Russian Federation, Neighbouring Territories and the World”. The study employed waveform data from the F-net network, operated by NIED (National Research Institute for Earth Science and Disaster Prevention, Japan), and the global network of seismic stations downloaded via the Wilber 3 system (https://ds.iris.edu/wilber3) of the IRIS consortium (Incorporated Research Institutions for Seismology). This work was supported by the Ministry of Science and Higher Education of the Russian Federation through state assignments Nos. 124020900029-7 and 075-00609-26. The data used in the work were obtained with large-scale research facilities “Seismic Infrasound Array for Monitoring of the Russian Federation, Neighbouring Territories and the World”. The study employed waveform data from the F-net network, operated by NIED (National Research Institute for Earth Science and Disaster Prevention, Japan), and the global network of seismic stations downloaded via the Wilber 3 system (https://ds.iris.edu/wilber3) of the IRIS consortium (Incorporated Research Institutions for Seismology).

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