Volcano Mahameru Outburst in the Southeast Asian nation Prompts Evacuations

Indonesia's Semeru volcano, the highest peak on Java island, has exploded, blanketing multiple communities with volcanic ash, prompting evacuations and causing officials to elevate the alert to the maximum level.

The volcano in East Java province released searing clouds of fiery ash and a mixture of rock, lava and gas that moved up to 7km down its sides multiple times from midday to dusk, while a thick column of fiery clouds rose 2km into the air, according to the nation's geological authority.

The outbursts that occurred throughout the day forced authorities to raise the volcano’s alert level on two occasions, from the third-highest level to the top level, the agency said. No deaths or injuries have been reported.

Over three hundred residents in the three villages most endangered in the area of Lumajang region were evacuated to government shelters, according to a representative for the national disaster mitigation agency.

He stated that heightened volcanic movements of the volcano on the afternoon of Wednesday led officials to widen the danger zone to 5 miles from the summit. Residents were advised to stay clear from an area along the Kobokan River, which is the path of the lava flow, as searing gas flowed down the volcano's sides.

Videos on social media displayed a dense cloud of volcanic dust sweeping through a wooded ravine to a river beneath a bridge. Residents, some with faces smeared with ash and rain, escaped to temporary shelters or left for alternative secure locations.

Local media indicated that authorities were facing challenges to rescue about 178 individuals trapped on the 3,676-metre peak at the Ranu Kumbolo observation station. The group included 137 climbers, 15 carriers, seven escorts and six tourism officials, according to an official with the national park.

“They are currently safe at Ranu Kumbolo monitoring post,” a spokesperson said in a video statement. He said the station was situated 2.8 miles from the summit on the north side of the volcano, which is not in the path of the fiery cloud movement that was seen moving to the south-southeast. Bad weather and precipitation forced the team to spend the night there, he explained.

The volcano, also called Great Mountain, has burst many occasions in the last two centuries. Still, as is the situation with many of the 129 active volcanoes in the archipelago, tens of thousands of people still to live on its productive highlands.

The mountain's previous significant explosion was in December 2021, when 51 individuals were killed and several hundred more were injured and settlements were buried in thick mud. The event forced the relocation of more than 10,000 residents from their houses.

Indonesia, an archipelago of more than 280 million inhabitants, sits along the Pacific “ring of fire”, a curved series of fault lines, and is prone to earthquakes and volcanism.