Mount Semeru 2 Times Eruption Accompanied By Eruption As High As 700 Meters

Mount Semeru erupted with an eruption as high as 700 meters above the peak on Friday (24/10/2025) morning. BETWEEN/HO-PVMBG

Mount Semeru, which is on the border of Lumajang and Malang Regencies, East Java (East Java), erupted twice again, accompanied by an eruption of 700 meters above the peak on Friday morning.

"The first eruption occurred at 05.42 WIB with an eruptive column height of about 700 meters above the peak or 4,376 meters above sea level (masl)," said Mount Semeru Observation Post Officer Yadi Yuliandi in Lumajang Regency, Antara, Friday, October 24.

According to him, the ash column was observed to be white to gray with moderate to western intensity.

"The eruption was recorded on a seismograph with a maximum amplitude of 22 mm and a duration of 123 seconds," he said.

The second eruption occurred at 10.58 WIB with the visual of the eruption not being observed, but the eruption was recorded on a seismograph with a maximum amplitude of 20 mm and a duration of 89 seconds.

He explained that Mount Semeru is still on Alert or Level II status so that the Center for Volcanology and Geological Hazard Mitigation (PVMBG) provides a number of recommendations, namely that people are prohibited from carrying out any activities in the southeast sector, along Besuk Kobokan as far as eight kilometers from the summit (the center of the eruption).

Outside of that distance, he said, people are not allowed to carry out activities at a distance of 500 meters from the riverbank along Besuk Kobokan, because it has the potential to be affected by the expansion of hot clouds and lava flows up to a distance of 13 kilometers from the summit.

"People are also advised not to move within a three-kilometer radius of the crater or peak of Mount Semeru, because it is prone to the dangers of incandescent stones," he said.

He appealed to the public to be aware of the potential for hot clouds, lava avalanches, and rain lava along rivers/valleys whose water flows originate at the top of Mount Semeru, especially along Besuk Kobokan, Besuk Bang, Besuk Kembar, and Besuk Sat, as well as the potential for lava in small rivers which are tributaries from Besuk Kobokan.