Volcano Semeru Eruption in the Southeast Asian nation Triggers Evacuations

Indonesia's Mount Semeru, the highest peak on the island of Java, has erupted, blanketing several villages with volcanic ash, prompting evacuations and leading authorities to raise the warning 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 moved up to 4 miles down its sides several times from midday to evening, while a dense plume of fiery clouds rose 2km into the sky, according to the nation's geological authority.

The eruptions that unfolded throughout the day forced authorities to increase the mountain's warning status on two occasions, from the third-highest level to the highest, the authority reported. No deaths or injuries have been reported.

More than 300 residents in the three communities most at risk in the area of Lumajang were evacuated to official safe havens, according to a representative for the national emergency management body.

He said that heightened volcanic movements of the volcano on the afternoon of Wednesday prompted authorities to expand the danger zone to 5 miles from the crater. Residents were urged to stay clear from an zone along the Besuk Kobokan River, which is the path of the molten rock stream, as scorching gases moved down the volcano's sides.

Videos on social media displayed a thick plume of volcanic dust moving through a wooded ravine to a waterway beneath a overpass. Residents, some with faces covered with volcanic dust and water, fled to temporary shelters or departed for alternative secure locations.

Regional news outlets indicated that emergency teams were facing challenges to save about 178 people stranded on the 3,676-metre peak 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 said in a video statement. He noted the post was situated 4.5km from the summit on the north side of the volcano, which is outside the trajectory of the fiery cloud movement that was seen moving to the southeast direction. Bad weather and precipitation required the group to remain overnight there, he added.

The volcano, also known as Great Mountain, has erupted many occasions in the past 200 years. However, as is the case with many of the 129 live volcanoes in the archipelago, tens of thousands of residents still to live on its productive highlands.

The mountain's last major eruption was in December 2021, when 51 individuals were killed and several hundred more were injured and settlements were buried in thick mud. The event led to the evacuation of more than 10,000 people from their homes.

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