TIME.CO, Yogyakarta – Geological Disaster Technology Research and Development Center (BPPTKG) relationship Mount Merapi on the border between Central Java and the Yogyakarta special region on Thursday, November 2, 2023, issued lava fall 13 times with a maximum scroll distance of 1,700 meters.
BPPTKG Yogyakarta head Agus Budi Santoso, in a statement in Yogyakarta, Thursday, said that based on observations from 00.00 to 06.00 WIB, the lava avalanche rolled towards Kali Bebeng and Kali Boyong.
“We observed 12 lava avalanches towards the Bebeng River with a maximum sliding distance of 1,700 meters. One lava avalanche was observed towards the Boyong River with a maximum sliding distance of 1,000 meters,” he said.
During the observation period, 22 avalanche earthquakes with an amplitude of 3-18 mm for 33.08-124.9 seconds, 27 multiphase earthquakes with an amplitude of 3-12 mm for 5 seconds also occurred on Mount Merapi. ,5-9.04 seconds and a distant tectonic earthquake with an amplitude of 15 mm for 299.52 seconds.
The low-pressure crater smoke above the top of Mount Merapi was observed to be white with bright intensity and a height of 75 meters above the top of the crater.
Previously, during Wednesday’s observation period between 00:00 and 24:00 WIB, Mount Merapi was also recorded 20 times launching lava avalanches towards the Bebeng River with a maximum flow distance of 1,900 meters. Three lava avalanches were observed in the direction of Kali Boyong with a maximum sliding distance of 1,500 meters. “The sound of five falls with moderate intensity was heard from the Babadan Post,” she said.
Based on the BPPTKG analysis for the period 20-26 October 2023, the morphology of the southwest dome of Mount Merapi observed slight changes due to lava avalanche activity. Meanwhile, no significant changes were observed for the central dome.
Announcement
Based on aerial photos from September 28, 2023, the volume of the southwest dome was measured at 3,097,700 cubic meters and that of the central dome at 2,358,500 cubic meters.
BPPTKG still maintains Mount Merapi’s status at Level III or Alert, established in November 2020.
The potential danger from falling lava and hot clouds could impact the Woro River up to three kilometers from the summit and the Gendol River up to five kilometers from the summit.
In addition to this, falling lava and hot clouds may impact the Boyong River up to five kilometers from the summit and the Bedog, Krasak and Bebeng Rivers up to seven kilometers from the summit.
If an explosive eruption occurs, the ejection of volcanic material from Mount Merapi can reach an area within a three kilometer radius of the mountain’s summit.
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