Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Temporal changes of seismic velocities below Bezymianny volcano prior to its explosive eruption on 20.12.2017. / Berezhnev, Yaroslav; Belovezhets, Nadezhda; Shapiro, Nikolai и др.
в: Journal of Volcanology and Geothermal Research, Том 433, 107735, 01.2023.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Temporal changes of seismic velocities below Bezymianny volcano prior to its explosive eruption on 20.12.2017
AU - Berezhnev, Yaroslav
AU - Belovezhets, Nadezhda
AU - Shapiro, Nikolai
AU - Koulakov, Ivan
N1 - This study is supported by the Russian Science Foundation Grant # 22-27-00374.
PY - 2023/1
Y1 - 2023/1
N2 - The strong explosive eruption of Bezymianny volcano (Klychevskoy volcano group) occurred on 21 December 2017, the preparation phases of which were recorded by a local seismic network. Applying methods of estimation of seismic velocity changes based on cross-correlation of ambient noise, we obtained different velocity variations at several passbands before the eruption. In order to explain the observations obtained, we performed qualitative mechanical estimates of stress changes resulting from the migration of the pressure source. The obtained and estimated velocity changes have the same patterns. We propose that observed and evaluated velocity changes are caused by fluids migration from mid-crustal magma reservoir of the Bezymianny volcano to the shallow magma chamber that then triggered the eruption.
AB - The strong explosive eruption of Bezymianny volcano (Klychevskoy volcano group) occurred on 21 December 2017, the preparation phases of which were recorded by a local seismic network. Applying methods of estimation of seismic velocity changes based on cross-correlation of ambient noise, we obtained different velocity variations at several passbands before the eruption. In order to explain the observations obtained, we performed qualitative mechanical estimates of stress changes resulting from the migration of the pressure source. The obtained and estimated velocity changes have the same patterns. We propose that observed and evaluated velocity changes are caused by fluids migration from mid-crustal magma reservoir of the Bezymianny volcano to the shallow magma chamber that then triggered the eruption.
KW - Ambient noise
KW - Bezymianny volcano
KW - Eruption precursors
KW - Kamchatka
KW - Seismic velocity variation
KW - Stress state modeling
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85144447467&origin=inward&txGid=d20e3a08559c53f124ffae5da2545593
UR - https://www.mendeley.com/catalogue/c8b0077f-f982-3a63-848e-f35bbb37f9e6/
U2 - 10.1016/j.jvolgeores.2022.107735
DO - 10.1016/j.jvolgeores.2022.107735
M3 - Article
VL - 433
JO - Journal of Volcanology and Geothermal Research
JF - Journal of Volcanology and Geothermal Research
SN - 0377-0273
M1 - 107735
ER -
ID: 55517918