Santiaguito Volcano Volcanic Ash Advisory: VA EM RPRTED BY INSIVUMEH, BUT NOT OBS ON STLT.
Reventador Volcano Volcanic Ash Advisory: VONA RPTS VA EM 13/1021Z to 14000 ft (4300 m)
Sinabung volcano (Sumatra, Indonesia): actively growing lava dome causes its partially collapse
Growing lava dome in the summit crater of Sinabung volcano (image: @jaimessincioco/twitter)
The effusive-explosive eruption of the volcano continues at elevated levels characterized by near-constant pyroclastic flows.
Continued rise of fresh viscous magma accumulating in actively growing lava dome in the inner summit crater causes generating the block-and-ash flows likely caused by gravitational collapse of the lava dome.
The block-and-ash flows continue to be observed that traveled over the southeast flanks at about 4,921 ft (1,500 m) distance from the summit. The phoenix clouds are associated with this process.
The sporadic explosions at the volcano generated an ash plumes, which reached approx. 12,000 ft (3,600 m) altitude.
The seismic instruments recorded 24 earthquakes related to pyroclastic flows and 10 volcano-tectonic earthquakes. Continuous volcanic tremor has been recorded.
The warning bulletin states that ballistic impacts of volcanic bombs and pyroclastic flows could affect an area of about 3 km distance from the main crater and 5 km on the SE flank and 4 km on the NE flank.
The Aviation Color Code remains at Orange.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi volcano activity update 20 November 2020
