Sheveluch volcano (Kamchatka, Russia): lava dome Dolphin-2 destroyed
mar., 27 juil. 2021, 02:5402:54 AM | AUTEUR : MARTIN
The extrusive and explosive eruption of the volcano continues.
Thermal anomaly continued to detect at the lava dome Dolphin-2 in the satellite image on 23 July, two days before its collapse (image: Sentinel 2)
The actively growing lava dome Dolphin-2 started to partially collapse as cracks occurred at the feature about one month ago. An increased activity at the volcano, reported by the volcanological observatory Kamchatka Volcanic Eruption Response Team (KVERT), started about 19:20 local time yesterday. The extrusive lava dome is likely being destroyed after an explosive eruption at the edifice as observed by the KVERT. A strong gas-steam plume containing some amount of ash extended about 42 km to the east of the volcano. The plume rose to an altitude of 14,000 ft (4,300 m).
Webcam images of the eruption are not reported nor by observatory or social media yet, but from available sources, it may assume that explosive collapse of the lava dome may have triggered block-and-ash flows (pyroclastic flows) known as Peléan type.
The lava dome had grown from the active lava dome and forming the "dome on top of a dome" in mid-May.
Source: Kamchatka Volcanic Eruption Response Team volcano activity update 26 July 2021
mar., 27 juil. 2021, 00:45
Shiveluch Volcano Volcanic Ash Advisory: ERUPTION AT 20210726/2317Z FL200 REPORTED OBS VA DTG: 27/0010Z