Mount Mahameru Eruption in the Southeast Asian nation Triggers Evacuations

Indonesia's Mount Semeru, the highest peak on Java island, has exploded, covering several villages with falling ash, leading to evacuations and causing officials to elevate the alert to the maximum level.

The mountain in East Java province unleashed blistering plumes of hot ash and a mixture of rock, lava and gas that travelled up to 4 miles down its sides several times from midday to evening, while a dense plume of fiery clouds rose 2km into the air, as stated by the nation's geological authority.

The outbursts that unfolded throughout the day compelled authorities to raise the mountain's warning status on two occasions, from the level three to the highest, the agency reported. No deaths or injuries have been announced.

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

He said that heightened volcanic movements of the volcano on the afternoon of Wednesday led officials to widen the danger zone to 8km from the crater. People were advised to stay clear from an area along the Kobokan River, which is the path of the lava flow, as scorching gases moved down Semeru’s slopes.

Footage on social media displayed a dense cloud of ash sweeping through a wooded ravine to a waterway beneath a overpass. Locals, some with faces covered with volcanic dust and water, escaped to makeshift refuges or departed for other safe areas.

Regional news outlets reported that authorities were struggling to rescue about 178 individuals trapped on the 3,676-metre peak at the Ranu Kumbolo monitoring post. The group comprised 137 climbers, 15 porters, seven escorts and six tourism officials, according to an spokesperson with the national park.

“They remain secure at the Ranu Kumbolo station,” a spokesperson said in a recorded message. He said the post was located 4.5km from the summit on the northern slope of the mountain, which is not in the path of the hot cloud flow that was observed moving to the southeast direction. Inclement conditions and precipitation forced the team to remain overnight there, he explained.

The volcano, also known as Great Mountain, has erupted numerous times in the last two centuries. However, as is the situation with many of the 129 active volcanoes in Indonesia, tens of thousands of residents continue to live on its productive highlands.

Semeru’s last major eruption was in late 2021, when 51 people were lost their lives and several hundred more were injured and settlements were buried in layers of mud. The event led to the evacuation of more than 10,000 residents from their houses.

Indonesia, an island chain of more than 280 million inhabitants, sits along the Pacific seismic belt, a horseshoe-shaped series of fault lines, and is susceptible to seismic events and volcanic activity.