Mount Semeru Eruption in Indonesia Triggers Emergency Relocations

The nation's Semeru volcano, the tallest summit on Java island, has exploded, covering multiple communities with falling ash, leading to evacuations and causing officials to elevate the warning to the maximum level.

The volcano in East Java province unleashed blistering plumes of hot ash and a combination of stone, molten rock, and gases that travelled up to 7km down its slopes several times from midday to dusk, while a thick column of hot clouds rose 2km into the sky, according to the nation's geological authority.

The eruptions that occurred throughout the day compelled officials to increase the mountain's warning status twice, from the level three to the highest, the agency said. No deaths or injuries have been announced.

More than 300 inhabitants in the three villages most at risk in the area of Lumajang were relocated to government shelters, as mentioned by a representative for the national disaster mitigation agency.

He stated that increased activity of the volcano on the afternoon of Wednesday prompted officials to expand the hazard area to 5 miles from the summit. Residents were advised to keep away from an area along the Kobokan River, which is the route of the molten rock stream, as searing gas moved down Semeru’s slopes.

Footage on social media displayed a dense cloud of ash moving through a wooded ravine to a waterway beneath a overpass. Residents, some with faces smeared with volcanic dust and rain, fled to makeshift refuges or departed for other safe areas.

Local media indicated that emergency teams were facing challenges to rescue about 178 individuals stranded on the 3,676-metre peak at the Ranu Kumbolo monitoring post. The group included 137 hikers, 15 porters, seven escorts and six travel representatives, according to an spokesperson with the national park.

“They are currently safe at the Ranu Kumbolo station,” a spokesperson said in a recorded message. He said the post was located 4.5km from the crater on the northern slope of the volcano, which is not in the path of the fiery cloud movement that was observed traveling to the southeast direction. Inclement conditions and precipitation forced the group to remain overnight there, he added.

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

Semeru’s previous significant explosion was in late 2021, when 51 people were killed and hundreds more were burned and settlements were submerged in layers of mud. The eruption led to the evacuation of more than 10,000 people from their homes.

The country, an archipelago of over 280 million people, sits along the Pacific “ring of fire”, a curved series of tectonic boundaries, and is susceptible to earthquakes and volcanism.

George Schroeder
George Schroeder

A seasoned journalist passionate about uncovering stories that bridge cultures and inspire change.