The lava dome of Mount Merapi increases in height, this is the explanation of BPPTKG

TIME.CO, Jakarta – The Center for Geological Disaster Technology Research and Development or BPPTKG mentioned the southwest lava dome Mount Merapi experienced an increase in height based on the results of observations during the week.

“In the morphology of the southwest dome, a slight increase in the height of the dome was observed, as well as changes due to lava avalanche activity,” said BPPTKG head Agus Budi Santoso, quoted in the agency’s written statement received in Yogyakarta, Sunday 1 October. 2023.

For the central dome of Merapi. no significant morphological changes were observed. Although he did not mention the height figure, according to Agus, the increased height of the lava dome southwest of Merapi was known from an analysis of the dome morphology based on observations from the Deles 5 Camera Station, nggularum, Ngepos , Babadan 2 from 22 to 28 September 2023.

Based on analysis of aerial photos from September 28, 2023, he said, 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.

The volume of the dome increased compared to the results of the aerial photo analysis on August 30, 2023, which still measured 2,858,600 cubic meters in the southwest dome and 2,355,100 cubic meters in the central dome.

Thermal analysis on the southwest dome observed that the highest temperature reached 409 degrees Celsius, while on the central dome the highest hot spot reached 236 degrees Celsius.

“There are no new points of magma extrusion (magma escaping to the Earth’s surface) in either the southwestern or central dome,” Agus said.

During the week’s observation period, he continued, Mount Merapi was recorded releasing lava avalanches 171 times in a south-east-west direction and the sound of the avalanche was heard 15 times from the Babadan Post.

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Mount Merapi has experienced 33 volcanic earthquakes

During that period, Mount Merapi was also recorded to have experienced 33 shallow volcanic earthquakes (VTB), 3,866 multi-phase (MP) earthquakes, four low-frequency (LF) earthquakes, 944 avalanche earthquakes (RF) and nine earthquakes tectonics. (TT ).

BPPTKG still maintains Mount Merapi’s status at Level III or Alert, established in November 2020.

Potential danger from falling lava and hot clouds could impact the Woro River up to 3 kilometers from the summit and the Gendol River up to 5 km from the summit.

In addition to this, falling lava and hot clouds may impact the Boyong River up to 5 km from the summit and the Bedog, Krasak and Bebeng Rivers up to 7 km from the summit.

If it happens eruption Explosively, ejection of volcanic material from Mount Merapi can reach an area within a 3 km radius of the mountain top.

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