Mount Merapi was observed increasing its volcanic activity again by spewing pyroclastic flows twice on Monday (6/7/2026) morning. This geological phenomenon occurred in quick succession within a relatively short period, specifically at 08:28 WIB and 08:41 WIB.
According to an official report from the Geological Disaster Technology Research and Development Center (BPPTKG), the first pyroclastic flow reached a distance of 1,700 meters toward the upper reaches of the Krasak River. This activity was recorded with a maximum amplitude of 32.92 mm and a duration of 103.55 seconds.
Just 13 minutes later, Merapi's peak released another pyroclastic flow with a greater reach, extending up to 2,000 meters toward the upper reaches of the Putih River. This second eruption had a stronger intensity with an amplitude of 121.54 mm and a duration of 124.88 seconds.
In response to these conditions, BPPTKG emphasized that Mount Merapi's status remains at Level III (Alert). Head of BPPTKG, Agus Budi Santoso, explained that continuous magma supply in the volcanic pocket keeps the mountain's condition highly dynamic and capable of triggering subsequent collapses.
Authorities have mapped hazard zones in the southern to southwestern sectors, encompassing main river flows such as Boyong, Bedog, Krasak, and Bebeng up to a maximum radius of 7 kilometers. Residents are urged not to conduct any activities within the high-risk zone and to remain vigilant against secondary threats such as cold lahar floods and volcanic ash fall during rain around the summit.
