Volcano Semeru Outburst in the Southeast Asian nation Triggers Evacuations

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

The volcano in the province of East Java unleashed blistering plumes of hot ash and a mixture of stone, molten rock, and gases that travelled up to 4 miles down its sides multiple times from noon to dusk, while a thick column of hot clouds rose 1.2 miles into the sky, as stated by Indonesia’s Geology Agency.

The outbursts that occurred throughout the day compelled officials to raise the mountain's warning status on two occasions, from the third-highest level to the top level, the authority reported. No deaths or injuries have been reported.

Over three hundred inhabitants in the three villages most at risk in the district of Lumajang region were evacuated to official safe havens, as mentioned by a spokesperson for the national disaster mitigation agency.

He said that heightened volcanic movements of the mountain on Wednesday afternoon led authorities to widen the danger zone to 5 miles from the summit. Residents were advised to keep away from an zone along the Kobokan River, which is the route of the molten rock stream, as scorching gases moved down Semeru’s slopes.

Videos on social media showed a thick plume of ash moving through a forested valley to a waterway beneath a overpass. Locals, some with faces smeared with ash and water, escaped to temporary shelters or departed for alternative secure locations.

Local media reported that authorities were facing challenges to rescue about 178 individuals trapped on the 3,676-metre mountain at the Ranu Kumbolo monitoring post. The group comprised 137 hikers, 15 porters, seven guides and six travel representatives, according to an spokesperson with the protected area.

“They are currently safe at the Ranu Kumbolo station,” an official said in a recorded message. He said the station was located 4.5km from the summit on the north side of the mountain, which is outside the trajectory of the fiery cloud movement that was seen moving to the southeast direction. Bad weather and rain forced the team to remain overnight there, he explained.

Semeru, also called Mahameru, has burst numerous times in the last two centuries. However, as is the case with many of the 129 active volcanoes in the archipelago, thousands of people continue to live on its fertile slopes.

The mountain's previous significant explosion was in December 2021, when 51 individuals were lost their lives and several hundred more were burned and settlements were buried in layers of mud. The eruption led to the evacuation of over ten thousand people from their houses.

Indonesia, an island chain of more than 280 million inhabitants, sits along the Pacific “ring of fire”, a curved series of fault lines, and is prone to seismic events and volcanic activity.