Grishin S. YU.
Issledovanie Zemli iz kosmosa 2021; (5): 66-71
The lava plug in the crater of the Sarychev Peak volcano (Kuril Islands) was carried away by explosions during a strong eruption in June 2009, after which the position of the crater bottom lowered sharply. Based on satellite images and images obtained during a flyby of the crater by helicopter in 2016, the level of the bottom subsidence was measured: about 190–220 m from the edge of the crater. The bottom was in a stable state until the fall of 2017, as identified by satellite images, after which it began to rise. As of autumn, 2019, the crater bottom has risen by about 150 m. The volume of the crater, filled during the uplift, is about 10 million m3. The bottom rise/decrease cycles have occurred three times over the past ~75 years in connection with each strong (significant) eruption. The modern rise probably signals the volcano’s preparation for a new, potentially dangerous eruptive event.
