Keywords
landslide
Mutnovsky deposit
Kamchatka
Section
Abstract
In late November–early December 2023, a large crater measuring approximately 190×125 m formed in the area of well 022 at the Mutnovsky steam-hydrothermal field. At the end of August, field work was carried out at this site which included orthophotography in the visible and infrared ranges, measurements of the temperature field at different depths in the bottom part of the crater, and the description and selection of sediments displaced from the crater. The work carried out, together with a comprehensive study of multispectral satellite images, made it possible to establish the timing and mechanism of the formation of this funnels. The main geological event that led to the formation of this funnel was a large landslide into the bed of the nearest stream, which subsequently caused several large hydrothermal explosions due to the removal of a significant portion of the lithostatic pressure, the deposits of which spread around the funnel over an area of more than 100000 m2.
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