Mount Semeru Outburst in Indonesia Triggers Evacuations

Indonesia's Mount Semeru, the highest peak on the island of Java, has erupted, covering multiple communities with falling ash, prompting evacuations and causing officials to elevate the alert to the maximum level.

The volcano in the province of East Java unleashed searing clouds of hot ash and a combination of stone, molten rock, and gases that travelled up to 7km down its slopes multiple times from noon to dusk, while a dense plume of hot clouds rose 2km into the sky, according to Indonesia’s Geology Agency.

The eruptions that occurred throughout the day forced officials to increase the volcano’s alert level twice, from the level three to the highest, the agency said. No casualties have been reported.

Over three hundred residents in the three communities most at risk in the district of Lumajang were evacuated to official safe havens, according to a representative for the national emergency management body.

He stated that increased activity of the mountain on the afternoon of Wednesday prompted officials to widen the danger zone to 8km from the summit. People were advised to stay clear from an zone along the Kobokan River, which is the path of the lava flow, as scorching gases moved down Semeru’s slopes.

Footage on online platforms displayed a thick plume of volcanic dust moving through a forested valley to a waterway beneath a bridge. Residents, some with faces smeared with ash and rain, escaped to makeshift refuges or departed for other safe areas.

Regional news outlets indicated that emergency teams were struggling to save about 178 individuals trapped on the 3,676-metre peak at the Ranu Kumbolo observation station. The party included 137 hikers, 15 carriers, seven guides and six travel representatives, according to an spokesperson with the protected area.

“They remain secure at the Ranu Kumbolo station,” an official stated in a video statement. He said the post was located 2.8 miles from the crater on the northern slope of the volcano, which is outside the trajectory of the fiery cloud movement that was seen traveling to the southeast direction. Bad weather and rain forced the team to spend the night there, he explained.

Semeru, also called Great Mountain, has erupted numerous times in the past 200 years. Still, as is the case with numerous of the 129 live volcanoes in the archipelago, tens of thousands of people still to live on its fertile slopes.

Semeru’s last major eruption was in late 2021, when 51 people were lost their lives and hundreds more were injured and settlements were buried in thick mud. The eruption forced the evacuation of more than 10,000 residents from their homes.

Indonesia, an island chain of more than 280 million inhabitants, is located along the Pacific “ring of fire”, a horseshoe-shaped series of tectonic boundaries, and is prone to seismic events and volcanic activity.