Two Types of Seismic Activity Prior to the 2006 Eruption of Augustine Volcano in Alaska

Авторы: Grekov EM, Shebalin PN, Smirnov VB
Журнал: Doklady Earth Sciences
Том: 520
Год издания: 2025
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 45-1
Последняя страница: 45-8
Номер статьи: 45
DOI: 10.1134/S1028334X24605273
Аннотация: The changes in volcanic seismicity regimes by the example of the 2006 eruption of Augustine Volcanoin Alaska are analyzed. During the long-term volcanic swarm preceding the eruption, two processeswith different seismicity regimes were identified. The first can be associated with general radial deformationscaused by an increase in pressure in the underground magma chamber; such a regime has a high value of theslope of the magnitude–frequency distribution and a low degree of clustering. The second process can presumablybe associated with an dike intrusion and local destruction of rocks under the pressure of the dike.This process has a slope parameter of the magnitude–frequency distribution close to one and shows a highlevel of clustering before the most significant events, which are followed by quiescence.
Добавил в систему: Смирнов Владимир Борисович

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