KOMPAS.com – Mount Sinabung which is in Karo Regency, North Sumatra, spewed hot clouds of avalanches on Tuesday (2/3/2021) morning.
This hot avalanche cloud glided at a distance of approximately 4,500 meters to the east southeast. Meanwhile, the height of the volcanic ash column is known to reach 5,000 meters.
This incident occurred around 07.15 WIB, but the increase in this activity was reported to have stopped. The last hot cloud of avalanche was observed at around 08.36 WIB.
There was a hot cloud of falling G. #Sinabung March 2, 2021 07:11 WIB with a sliding distance of 3000 m to the east-southeast. Seismicity is recorded on a seismogram with a maximum amplitude of 120 mm and a duration of 243 seconds. Photo: Sinabung Volcano Observation Post-PVMBG pic.twitter.com/RwMRtcWyas
— MAGMA Indonesia (@id_magma) March 2, 2021
The following is an explanation of the Center for Volcanology and Disaster Mitigation ( PVMBG) related to the increased activity of Mount Sinabung on Tuesday (2/3/2021):
Head of the Sub-Division of Volcanic Mitigation for the Western Region of the Center for Volcanology and Disaster Mitigation (PVMBG) Nia Haerani said that hot cloud avalanche activity had begun to appear at 06.42 WIB.
The distance of hot avalanche clouds as far as 2,000-5,000 meters to the southeast east and the smoke column as high as 4,000-5,000 meters.
“As of 08:20 WIB there have been 13 instances of hot cloud avalanches,” said Nia when contacted Kompas.com, Tuesday (2/3/2021).
This mountain activity has indeed increased since this morning, marked by hot clouds of avalanche, but similar activity has reportedly stopped.
Based on visual monitoring and seismicity up to 09.00 WIB, there is no indication of an increase in the potential threat of danger.
“Now it has subsided, right, the last hot cloud was falling around 08.36 WIB,” said Nia.
Be aware of potential hazards
The activity of Mount Sinabung itself has been declining to date, however there are a number of potential hazards that need to be watched out for.
Such as the possibility of another explosive eruption, hot cloud avalanches, rocks, and incandescent lava.
Nia explained, the danger of the distribution of hot clouds of avalanche material and rock avalanches covers the south, east to southeast sectors within a radius of 4-5 km.
Meanwhile, the distribution of ash-sized eruptive material can be further spread, depending on the direction and speed of the wind.
As for lava, it is estimated that it will flow in the river valleys that originate at Mount Sinabung, especially if there is high rainfall.
Currently, Mount Sinabung is still at Level III or Alert since May 20, 2019.
Seeing the current condition of Mount Sinabung, PVMBG recommends a number of things, namely:
- People and tourists are prohibited from doing activities in villages within a radius of 3 km from the summit, 4 km in the east-north sector, 5 km for the south-east sector.
- If there is a rain of ash, people are advised to use masks when leaving the house to reduce the impact of health problems that can occur.
- Regarding the ashes, people are also advised to secure clean water facilities, such as wells, and clean roofs of houses. If the ash is too thick, it is feared that it can trigger buildings to collapse.
- People who live along the river that has its head in Sinabung are advised to always be aware of the possibility of lava flow.
The highest volcano in North Sumatra province has indeed been erupting since 2013, although not continuously.
The character of the eruption that occurs is like an explosive eruption accompanied by the formation of a lava dome at the top.