Volcano Semeru Outburst in the Southeast Asian nation Prompts Evacuations

The nation's Semeru volcano, the highest peak on Java island, has erupted, covering several villages with volcanic ash, leading to evacuations and causing officials to elevate the warning to the maximum level.

The volcano in the province of East Java released blistering plumes of hot ash and a mixture of rock, lava and gas that moved up to 7km down its sides several times from noon to evening, while a thick column of hot clouds rose 2km into the sky, as stated by Indonesia’s Geology Agency.

The eruptions that occurred throughout the day compelled authorities to raise the mountain's warning status twice, from the level three to the top level, the authority reported. No deaths or injuries have been announced.

More than 300 residents in the three villages most endangered in the district of Lumajang were relocated to government shelters, as mentioned by a spokesperson for the national disaster mitigation agency.

He stated that increased activity of the volcano on Wednesday afternoon led authorities to widen the danger zone to 8km from the crater. Residents were advised to keep away from an zone along the Besuk Kobokan River, which is the route of the lava flow, as searing gas flowed down the volcano's sides.

Videos on online platforms showed a dense cloud of ash sweeping through a forested valley to a waterway beneath a bridge. Locals, some with faces covered with volcanic dust and water, escaped to makeshift refuges or left for other safe areas.

Local media indicated that authorities were struggling to rescue about 178 people trapped on the 3,676-metre peak at the Ranu Kumbolo monitoring post. The party included 137 climbers, 15 carriers, seven escorts and six tourism officials, according to an spokesperson with the protected area.

“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 north side of the mountain, which is not in the path of the hot cloud flow that was seen moving to the southeast direction. Inclement conditions and precipitation required the team to remain overnight there, he added.

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

The mountain's previous significant explosion was in late 2021, when 51 people were lost their lives and hundreds more were burned and settlements were buried in layers of mud. The eruption forced the evacuation of over ten thousand people from their houses.

The country, an archipelago of more than 280 million people, sits along the Pacific seismic belt, a horseshoe-shaped series of fault lines, and is susceptible to earthquakes and volcanic activity.