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Merapi volcano (Central Java, Indonesia) - Smithsonian / USGS Weekly Volcanic Activity Report for 24 March-30 March 2021 (Continuing Activity)

Ср, 24 мар 2021, 06:00
06:00 AM | ПЇЅПЇЅПЇЅПЇЅПЇЅ: VN
BPPTKG reported that the lava dome just below Merapi's SW rim continued to grow and shed material down the flank during 19-25 March. The 2021 lava dome volume was an estimated 949,000 cubic meters on 25 March, with a growth rate of about 13,300 cubic meters per day. The Mount Merapi Selo Observation Post reported a white gas-and-steam plume rose 500 m above the crater on 25 March at 1430.
Four pyroclastic flows traveled a maximum of 1.8 km down the SW flank, three of which occurred on 27 March at 0602, 0603, and 0631. An ash plume caused by a pyroclastic flow rose 3.5 km (12,000 ft) a.s.l. and drifted SW for about 1.3 km on 27 March at 1758 on, according to a ground observer.
Incandescent avalanches, recorded 104 times, traveled as far as 1.2 km down the SW flank and twice down the SE flank as far as 400 m. The summit lava dome measured 65 m tall, similar to the previous week. On 30 March there were 33 incandescent avalanches observed traveling up to 1 km down the SW flank, one of which continued up to 1.5 km.
One incandescent avalanche was observed from the lava dome. The Alert Level remained at 3 (on a scale of 1-4), and the public were warned to stay 5 km away from the summit.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Badan Nacional Penanggulangan Bencana (BNPB), Balai Penyelidikan dan Pengembangan Teknologi Kebencanaan Geologi (BPPTKG)
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From: Global Volcanism Program, 2021. Report on Merapi. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 24 March-30 March 2021. Smithsonian Institution and US Geological Survey.

Предыдущие новости

Wed, 17 Mar 2021, 06:00
BPPTKG reported that the lava dome just below Merapi's SW rim and the lava dome in the summit crater both continued to grow during 12-18 March. The 2021 lava-dome volume was an estimated 840,000 cubic meters on 18 March, with a growth rate of about 12,900 cubic meters per day, and continued to shed material down the flank. A total of three pyroclastic flows traveled a maximum of 1 km down the SW flank. ... Read all
Mon, 15 Mar 2021, 10:09
Glowing rockfalls from the active lava dome (image: PVMBG)
The active lava dome continues to grow and produce incandescent rockfall avalanches that descended the SW slope of the volcano. Collapsing parts of the flow generated a small avalanches that lifted an ash plumes (so-called phoenix clouds). ... Read all
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