Volcano Semeru Eruption in the Southeast Asian nation Triggers Evacuations

Indonesia's Mount Semeru, the tallest summit on Java island, has erupted, covering multiple communities with volcanic ash, leading to evacuations and causing officials to elevate the alert to the maximum level.

The volcano in East Java province unleashed blistering plumes of fiery ash and a combination of rock, lava and gas that travelled up to 7km down its slopes several times from noon to dusk, while a thick column of fiery clouds rose 2km into the air, as stated by Indonesia’s Geology Agency.

The eruptions that occurred throughout the day forced officials to increase the volcano’s alert level on two occasions, from the level three to the top level, the authority said. No deaths or injuries have been reported.

More than 300 inhabitants in the three communities most endangered in the area of Lumajang were evacuated to official safe havens, according to a spokesperson for the national emergency management body.

He stated that heightened volcanic movements of the mountain on Wednesday afternoon led authorities to widen the danger zone to 8km from the summit. Residents were advised to stay clear from an area along the Besuk Kobokan River, which is the route of the molten rock stream, as scorching gases flowed down the volcano's sides.

Footage on social media displayed a dense cloud of ash moving through a forested valley to a waterway beneath a overpass. Locals, some with faces covered with ash and water, escaped to makeshift refuges or left for alternative secure locations.

Local media indicated that authorities were facing challenges to rescue about 178 people trapped on the 12,060-foot peak at the Ranu Kumbolo monitoring post. The party included 137 hikers, 15 carriers, seven escorts and six travel representatives, according to an spokesperson with the national park.

“They are currently safe at Ranu Kumbolo monitoring post,” a spokesperson said in a recorded message. He said the station was situated 2.8 miles from the crater on the northern slope of the mountain, which is outside the trajectory of the hot cloud flow that was seen traveling to the southeast direction. Bad weather and rain forced the group 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 last major eruption was in late 2021, when 51 individuals were lost their lives and several hundred more were burned and settlements were buried in thick mud. The event forced the evacuation of more than 10,000 people from their homes.

The country, an archipelago of over 280 million inhabitants, is located along the Pacific seismic belt, a horseshoe-shaped series of fault lines, and is prone to seismic events and volcanism.