Merapi volcano (Java, Indonesia): series of strong pyroclastic flows this morning

Mi, 27. Jan 2021, 09:44
09:44 AM | VON: MARTIN
Strong block-and-ash flow from the collapsing lava dome at Merapi volcano today (image: @frekom_diy/twitter)
Strong block-and-ash flow from the collapsing lava dome at Merapi volcano today (image: @frekom_diy/twitter)
Pyroclastic flow from the collapsing lava dome at Merapi volcano today (image: @BPPTKG/twitter)
Pyroclastic flow from the collapsing lava dome at Merapi volcano today (image: @BPPTKG/twitter)
The extrusive eruption of the volcano continues at elevated levels.
A series of strong pyroclastic flows were released from the actively growing lava dome in the inner summit crater this morning at about 06:00 local time. Gravitational collapse of the lava dome parts generated the block-and-ash flows that descended the SW flank of the volcano. Glowing avalanches reached 800 m-1200 m in the Kali Krasak drainage and lasted approx. 83-122 seconds.
Ash plumes separating from the pyroclastic density current (so-called phoenix clouds) extended about 1200 m to the southwest of the volcano. Pyroclastic flow is volcanic phenomenon includes turbulent and hot avalanches of hot lava rocks, ash and volcanic gasses mixed together.

Strong pyroclastic flow from Merapi's lava dome:

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Mi, 27. Jan 2021, 06:00
BPPTKG reported that the “2021 lava dome” continued to effuse just below Merapi's SW rim during 22-28 January, producing a total of 230 incandescent lava avalanches that traveled as far as 1.5 km down the Krasak and Boyong river drainages on the SW flank. Pyroclastic flows were recorded 71 times and descended the Boyong drainage as far as 3.5 km. A comparison of photos taken on 21 and 26 January showed that the morphological changes in the summit area were attributed to the emergence of lava domes. ... Read all
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