Hot clouds of avalanche of Mount Merapi can be seen from Kaliurang, Sleman, DI Yogyakarta, Wednesday (27/1/2021). – (BETWEEN PHOTOS / Hendra Nurdiyansyah / wsj)
BPPTKG deployed drones to monitor Merapi.
Bali Tourism – The Geological Disaster Technology Research and Development Center (BPPTKG) flew a drone to the summit area of Mount Merapi. This is done in order to validate the sliding distance of hot avalanches that occurred some time ago.
Head of the Geological Disaster Technology Research and Development Center (BPPTKG) Hanik Humaida said drone flights to the peak area of Mount Merapi were needed to take aerial photographs of the Boyong River channel. In addition, later it can be used to reconfirm the sliding distance of the hot avalanche clouds.
“The results of the aerial photographs show that the hot clouds of avalanche on Wednesday (27/1/2021) reached 3.5 km for an oblique distance or 3.2 km if the horizontal distance is calculated,” Hanik said in a written statement to the media crew, Friday. (29/1/2021).
Hanik said that the hot avalanche clouds were still within the recommended hazard distance set by the BPPTKG. From the recommendations that have been given, the distance or radius of danger is 5 kilometers from the top of Mount Merapi.
At 10 o’clock, Merapi launched hot clouds with a distance of 2,000 meters
Previously it was known that in the activity of Mount Merapi, the observation period on Wednesday (27/1/2021) at 00.00 WIB – 24.00 WIB then there had been 52 times of hot cloud vomiting. The maximum distance of the incandescent lava was recorded as long as 3000 meters or 3 kilometers to the southwest or to be precise to Kali Boyong and Krasak.
The amplitudes recorded in the hot cloud vomit for this period were between 15-77 mm with a duration of 75-317.8 seconds. Meanwhile, the height of the column was observed to be swept away by strong winds from West to East.
From the data recorded by the BPPTKG, there were 274 times avalanches. With amplitudes ranging from 4-65 mm and a duration of 11-200 seconds.
Hanik conveyed, based on the total probability distribution of 17 indicators, the effusive eruption was still at the top with a probability of 43.2 percent. Meanwhile, the explosive potential and the inner dome decreased significantly.
Through that conclusion, said Hanik, he added to paying attention to the current eruption that was heading to the southwest. So the current potential danger is in the form of lava avalanches and hot clouds.
Mount Merapi Activity Increases, Wedhus Gembel Glides Up to 3 KM
The potential danger will focus on the Kali Kuning, Boyong, Bedog, Krasak, Bebeng and Putih sectors for a maximum of 5 kilometers. Meanwhile, the eruption of volcanic material in the event of an explosive eruption can reach a maximum of 3 kilometers from the summit.
In addition, mining activities in the rivers that head up at Mount Merapi in KRB III are also recommended to be suspended temporarily. Coupled with an appeal to tourism actors not to carry out tourism activities at KRB III Mount Merapi including climbing activities to the top in current conditions.
It should also be noted that until now, the BPPTKG is still setting the status of Mount Merapi on Alert (Level III).