Mount Semeru Eruption in the Southeast Asian nation Triggers Evacuations

Indonesia's Semeru volcano, the tallest summit on Java island, has erupted, blanketing several villages with volcanic ash, prompting evacuations and leading authorities to raise the alert to the maximum level.

The mountain in the province of East Java released blistering plumes of hot ash and a combination of rock, lava and gas that moved up to 7km down its slopes several times from midday to evening, while a thick column of fiery clouds rose 2km into the air, as stated by the nation's geological authority.

The eruptions that occurred throughout the day forced officials to raise the mountain's warning status twice, from the third-highest level to the top level, the authority reported. No casualties have been announced.

More than 300 inhabitants in the three villages most at risk in the area of Lumajang region were relocated to official safe havens, according to a representative for the national disaster mitigation agency.

He said that heightened volcanic movements of the volcano on the afternoon of Wednesday led officials to expand the hazard area to 8km from the crater. Residents were advised to keep away from an area along the Besuk Kobokan River, which is the route of the molten rock stream, as searing gas moved down the volcano's sides.

Footage on online platforms showed a thick plume of ash moving through a wooded ravine to a river beneath a bridge. Residents, some with faces covered with volcanic dust and rain, escaped to makeshift refuges or departed for alternative secure locations.

Local media reported that authorities were facing challenges to save about 178 people stranded on the 12,060-foot mountain at the Ranu Kumbolo observation station. The group included 137 climbers, 15 carriers, seven escorts and six travel representatives, according to an official with the national park.

“They remain secure at Ranu Kumbolo monitoring post,” a spokesperson stated in a recorded message. He noted the post was located 2.8 miles from the crater on the north side of the volcano, which is outside the trajectory of the fiery cloud movement that was observed moving to the southeast direction. Inclement conditions and precipitation forced the group to remain overnight there, he explained.

The volcano, also called Mahameru, has burst many occasions in the past 200 years. Still, as is the case with many of the 129 active volcanoes in the archipelago, tens of thousands of residents still to reside on its productive highlands.

The mountain's last major eruption was in December 2021, when 51 people were lost their lives and several hundred others were burned and settlements were submerged in thick mud. The event led to the relocation of more than 10,000 people from their houses.

Indonesia, an archipelago of more than 280 million inhabitants, is located along the Pacific seismic belt, a curved series of fault lines, and is susceptible to earthquakes and volcanic activity.