The Geological Disaster Technology Research and Development Center (BPPTKG) reported an increase in activity at Mount Merapi during the observation period on Monday (13/7/2026) night. A total of six incandescent lava avalanches were recorded sliding down from the volcano's peak toward the upstream of Kali Sat and Kali Putih, with a maximum sliding distance of 2,000 meters.
Although no smoke was visually observed from the crater during the observation period from 18:00 to 24:00 WIB, monitoring instruments recorded significant internal dynamics. There were 30 avalanche earthquakes, seven multi-phase or hybrid earthquakes, and two distant tectonic earthquakes recorded, indicating that magma supply within the volcano's body is still ongoing.
To date, BPPTKG maintains Mount Merapi's status at Level III (Alert). The public is once again reminded to comply with the exclusion zone, particularly in the south-southwest sector, which includes the paths of the Boyong, Bedog, Krasak, and Bebeng Rivers, as well as the southeast sector along the Woro and Gendol Rivers.
The potential threat of pyroclastic flows and volcanic material ejection within a 3-kilometer radius of the peak remains the primary concern. In addition to the eruption threat, residents are urged to remain vigilant against potential lahar floods that could occur at any time, especially during heavy rainfall on the slopes of Merapi's peak.
