TY - JOUR

T1 - Crustal Sources of Geothermal and Magmatic Activity in the Area of Mutnovsky-Gorely Volcanic Complex (Kamchatka) Inferred From Ambient Noise Tomography

AU - Belovezhets, N.

AU - Berezhnev, Y.

AU - Abramenkov, S.

AU - Abkadyrov, I.

AU - Dergach, P.

AU - Khmarin, E.

AU - Chebrov, D.

AU - Koulakov, I.

N1 - Belovezhets, N., Berezhnev, Y.,Abramenkov, S., Abkadyrov, I., Dergach,P., Khmarin, E., et al. (2026). Crustalsources of geothermal and magmaticactivity in the area of Mutnovsky‐Gorelyvolcanic complex (Kamchatka) inferredfrom ambient noise tomography. Journalof Geophysical Research: Solid Earth,131, e2025JB032025 The temporal seismic networks installationwas supported by JSC “Zarubezhneft” andInstitute of Petroleum Geology andGeophysics SB RAS. The data from KBGS RAS permanent seismic stations wasobtained with large‐scale researchfacilities «Seismic infrasound array formonitoring Arctic cryolitozone andcontinuous seismic monitoring of theRussian Federation, neighbouringterritories and the world» (https://ckp‐rf.ru/usu/507436/) and provided within thestate assignment according to the researchproject #075‐00604‐25 by DC. The datapreparation was carried out by SA withinthe state assignment according to theresearch project FSUS‐2025‐0015. Thecontribution of IK, who performed theambient noise tomography, was supportedby the state assignment according to theresearch project FWZZ‐2022‐0017. Wegratefully acknowledge Dr. RuslanZhostkov and Dr. Dmitry Presnov(Schmidt Institute of Physics of the Earth,RAS, Moscow) for providing 9 broadbandintegrated seismographs and participatingin field operations. We also thank theadministration of the Institute of the Earth'sCrust SB RAS (Irkutsk) for supplyinghigh‐quality instruments for two additionalbroadband stations. Special appreciation isextended to Dr. Sergey Yaskevich, Dr.Alexandr Yablokov, Arkady Drobchik,Svyatoslav Ponasenko, and Nina Russkikhfor their dedicated work in installing anddismantling this massive joint seismicnetwork. We are especially grateful to thehelicopter pilot Gennady Kroshkin forfacilitating instrument deployment inremote areas, and to Ivan Boronin forexpertly navigating Kamchatka'schallenging terrain by truck.

PY - 2026/1

Y1 - 2026/1

N2 - The Mutnovsky and Gorely volcanoes in Kamchatka, located 70–80 km southwest of Petropavlovsk-Kamchatsky, pose significant hazard due to their potential for explosive eruptions. Mutnovsky also hosts the Mutnovsky Geothermal Power Plant (MGPP). This study presents the first crustal-scale three-dimensional seismic velocity model derived from ambient noise tomography, utilizing data from a temporary 2023–2024 seismic network of 65 mixed broadband and short-period stations, in addition to four permanent stations. The model reveals multiple low-velocity zones: a low-velocity anomaly at 2–5 km depth below sea level is interpreted as a Mutnovsky magma chamber, while the other one at 2.5–5 km depth beneath the MGPP likely reflects an active magmatic intrusion sustaining the geothermal system. A shallow anomaly at 0.5–1 km depth beneath the MGPP is attributed to production intervals associated with geothermal boreholes. Furthermore, the model indicates hydrothermal connectivity between the Mutnovsky field and the Zhirovskoy Valley, with no apparent connection to the Vilyuchinsky Valley springs. Beneath the Gorely caldera, a wide low-velocity zone suggests the presence of unconsolidated sediments and an underlying magmatic intrusion at 2–4 km depth.

AB - The Mutnovsky and Gorely volcanoes in Kamchatka, located 70–80 km southwest of Petropavlovsk-Kamchatsky, pose significant hazard due to their potential for explosive eruptions. Mutnovsky also hosts the Mutnovsky Geothermal Power Plant (MGPP). This study presents the first crustal-scale three-dimensional seismic velocity model derived from ambient noise tomography, utilizing data from a temporary 2023–2024 seismic network of 65 mixed broadband and short-period stations, in addition to four permanent stations. The model reveals multiple low-velocity zones: a low-velocity anomaly at 2–5 km depth below sea level is interpreted as a Mutnovsky magma chamber, while the other one at 2.5–5 km depth beneath the MGPP likely reflects an active magmatic intrusion sustaining the geothermal system. A shallow anomaly at 0.5–1 km depth beneath the MGPP is attributed to production intervals associated with geothermal boreholes. Furthermore, the model indicates hydrothermal connectivity between the Mutnovsky field and the Zhirovskoy Valley, with no apparent connection to the Vilyuchinsky Valley springs. Beneath the Gorely caldera, a wide low-velocity zone suggests the presence of unconsolidated sediments and an underlying magmatic intrusion at 2–4 km depth.

KW - Gorely volcano

KW - Kamchatka

KW - Mutnovsky volcano

KW - ambient noise

KW - geothermal

KW - surface wave tomography

UR - https://www.scopus.com/pages/publications/105026172338

UR - https://www.mendeley.com/catalogue/cee0ae4f-c8ac-3599-ba94-0eea268d1ad7/

U2 - 10.1029/2025JB032025

DO - 10.1029/2025JB032025

M3 - Article

VL - 131

JO - Journal of Geophysical Research: Solid Earth

JF - Journal of Geophysical Research: Solid Earth

SN - 2169-9313

IS - 1

M1 - e2025JB032025

ER -