Semeru Eruption Ends 18.11 WIB, Lumajang Regent: Vigilance Cannot Decrease

Lumajang Regent Indah Amperawati monitors the activities of Mount Semeru at the Mount Semeru Observation Post on Mount Sawur, Sumberwuluh Village, Wednesday (19/11/2025). ANTARA/HO-BPBD Lumajang

JAKARTA - The eruption activity of Mount Semeru, which was observed this afternoon, is confirmed to end at 18.11 WIB, but the government and the volcanology authorities are still setting Level IV or Alert status to anticipate potential follow-up activities that may occur.

"The eruption has indeed stopped, but the status of Alert is maintained for the safety of the residents. The potential for further activities can still occur, so vigilance must not decrease," said Lumajang Regent Indah Amperawati while inspecting the location affected by Semeru hot clouds in Jarit Village, Candipuro District, Wednesday night, confiscated by Antara.

According to him, the highest mountain activity on the island of Java still has to be closely monitored and the volcanic observation team at the Mount Semeru Observation Post on Mount Sawur also continues to carry out visual and instrumental monitoring.

"Although the ejection of material is no longer visible, the potential danger in the form of avalanches, hot clouds, or cold lava floods remains a major concern, especially for residents living around rivers and valleys," he said.

He explained that the Lumajang Regency Government had reminded residents not to do activities in the red zone and to stay away from river flow areas that head up to Semeru.

"Joint officers from the TNI, Polri, BPBD, and volunteers are still on standby to ensure that there is no movement of residents to dangerous areas, especially in the Semeru red zone," he said.

The government emphasized that all handling steps were directed at preventing victims and ensuring that the community remained in a safe location until conditions were actually declared stable by the authorities.

The activity of Mount Semeru has increased from Level III (Alert) to Level IV (Alert) since Wednesday at 17.00 WIB with the main recommendation that people/visitors/tourists should not carry out any activities in the southeast sector along Besuk Kobokan, as far as 20 km from the summit (the center of the eruption).

Beyond that distance, people are also not allowed to carry out activities at a distance of 500 meters from the riverbank (river border) along Besuk Kobokan.

The community is also not allowed to move within a radius of 8 km from the crater/peak of Mount Semeru because it is prone to the danger of throwing stones (pijar).