Volcano Semeru Eruption in the Southeast Asian nation Triggers Evacuations

The nation's Semeru volcano, the tallest summit on Java island, has erupted, blanketing multiple communities with volcanic ash, prompting evacuations and leading authorities to raise the alert to the highest level.

The mountain in the province of East Java released searing clouds of fiery ash and a mixture of stone, molten rock, and gases that moved up to 7km down its sides multiple times from midday 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 forced authorities to increase the mountain's warning status 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 inhabitants in the three communities most at risk in the area of Lumajang region were evacuated to government shelters, as mentioned by a representative for the national disaster mitigation agency.

He stated that increased activity of the mountain on Wednesday afternoon led officials to expand the hazard area to 8km from the crater. People were urged to keep away from an zone along the Besuk Kobokan River, which is the route of the lava flow, as searing gas moved down Semeru’s slopes.

Footage on social media displayed a thick plume of volcanic dust moving through a forested valley to a river beneath a overpass. Residents, some with faces smeared with volcanic dust and water, fled to makeshift refuges or departed for other safe areas.

Local media reported that emergency teams were struggling to save about 178 people trapped on the 12,060-foot mountain at the Ranu Kumbolo monitoring post. The party included 137 hikers, 15 carriers, seven escorts and six tourism officials, according to an spokesperson with the national park.

“They remain secure at Ranu Kumbolo monitoring post,” an official 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 outside the trajectory of the hot cloud flow that was observed traveling to the southeast direction. Bad weather and rain forced the team to spend the night there, he added.

The volcano, also known as Great Mountain, has burst many occasions in the last two centuries. However, as is the case with numerous of the 129 active volcanoes in Indonesia, tens of thousands of people still to live on its productive highlands.

The mountain's previous significant explosion was in late 2021, when 51 individuals were lost their lives and several hundred more were injured and villages were buried in thick mud. The eruption forced the relocation of over ten thousand residents from their houses.

Indonesia, an archipelago of more than 280 million inhabitants, sits along the Pacific seismic belt, a horseshoe-shaped series of fault lines, and is prone to earthquakes and volcanism.