This is the Latest Report from BPPTKG Yogyakarta, Changes in the Morphology of Mount Merapi’s Lava Dome

by Yogyakarta – The Center for Geological Disaster Research and Technology Development (BPPTKG) reported an increase in seismic activity for Mount Merapi this week (13-19 / 11/2020) compared to the previous week.

“The intensity of the seismicity this week is higher than last week,” said the Head of BPPTKG, Hanik Humaida, Friday (20/11/2020).

Head of BPPTKG, Hanik Humaida (IST)

In this week the Mount Merapi seismicity was recorded 262 times Shallow Volcanic earthquakes (VTB), 1,939 times Multi-Phase (MP) earthquakes, 7 times Low Frequency (LF) earthquakes, 441 times crashes (RF), 352 Gusts (DG) earthquakes, and 8 times the tectonic earthquake (TT).

Visually, the weather around Mount Merapi is generally sunny in the morning, while from day to night it’s foggy.

Smoke white, thin to thick thickness with weak pressure.

A maximum smoke height of 200 m is observed from the Mount Merapi Selo Observation Post on November 16, 2020 at 07.45 WIB.

“Drops were observed from the Mount Merapi Babadan Observation Post with a maximum sliding distance of 2 km in the west sector to the upper reaches of Kali Lamat on November 14 at 6:15 a.m. WIB,” said Hanik.

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Mount Merapi Via PGM Selo.
Mount Merapi Via PGM Selo. (BPPTKG twitter)

In addition, the morphological analysis of the crater area based on photos from the southeast sector on November 19 to November 11, 2020 shows a change in the morphology of the dome, namely the collapse of a part of the 2018 lava dome.

Meanwhile, based on the analysis of drone photos on November 16, 2020, it was observed that there was a change in the morphology of the crater wall due to the collapse of the old lava, especially Lava1997 (South), Lava1998, Lava1888 (West), and Lava 1954 (North).

ÔÇťApart from that, we have not yet observed a new lava dome. The volume calculation of the lava dome based on the drone photo is 200,000 m3, “said Hanik.

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