Ivan Koulakov: Multiscale structure of magma feeding system beneath Kamchatka

Institute of Geophysics - guest lectures
Ivan Koulakov (Institute of Petroleum Geology and Geophysics, Novosibirsk, Russia):
Multiscale structure of magma feeding system beneath Kamchatka based on seismic tomography studies
Magma generation is a complex process that occurs in a broad range of depths starting from the subducted slab up to the upper crust below the volcano's edifice. Its understanding requires implementation of multiscale geophysical studies, of which seismic tomography takes an important place. In the talk, several recent results of seismic tomography studies of Kamchatka will be presented, such as:
1. Temporary and permanent seismic networks in Kamchatka (2012-2022).
2. Large-scale tomography study of the subduction zone beneath Kamchatka.
3. Crustal-scale tomography reveals three different magma feeding systems beneath the Klyuchevskoy, Bezymianny and Tolbachik volcanoes.
4. Middle-scale tomography reveals the magma paths in the mantle wedge, which explains the unusual productivity of volcanoes of the Klyuchevskoy group.
5. Small-scale tomography provides the locations of gas and magma reservoirs responsible for a violent explosive eruption of Bezymianny that occurred on 20.12.2017.

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