Volcano Mahameru Outburst in the Southeast Asian nation Triggers Emergency Relocations
Indonesia's Mount Semeru, the highest peak on the island of Java, has exploded, blanketing multiple communities with falling ash, prompting evacuations and leading authorities to raise the warning to the highest level.
The mountain in East Java province unleashed blistering plumes of fiery ash and a combination of stone, molten rock, and gases that moved up to 4 miles down its slopes multiple times from midday to evening, while a dense plume of fiery clouds rose 2km into the air, as stated by Indonesia’s Geology Agency.
The eruptions that occurred throughout the day compelled officials to increase the mountain's warning status on two occasions, from the level three to the highest, the agency said. No casualties have been reported.
More than 300 inhabitants in the three villages most at risk in the area of Lumajang region were evacuated to government shelters, according to a spokesperson for the national emergency management body.
He said that increased activity of the volcano on the afternoon of Wednesday prompted officials to expand the danger zone to 8km 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 searing gas moved down Semeru’s slopes.
Videos on social media showed a dense cloud of ash sweeping through a forested valley to a waterway beneath a bridge. Residents, some with faces covered with ash and rain, escaped to makeshift refuges or departed for other safe areas.
Local media indicated that emergency teams were struggling to save about 178 people trapped on the 3,676-metre mountain at the Ranu Kumbolo monitoring post. The group comprised 137 hikers, 15 porters, seven guides and six travel representatives, according to an official with the national park.
“They are currently safe at Ranu Kumbolo monitoring post,” an official stated in a video statement. He said the post was situated 2.8 miles from the summit on the northern slope of the volcano, which is outside the trajectory of the hot cloud flow that was seen moving to the south-southeast. Inclement conditions and precipitation required the team to spend the night there, he added.
The volcano, also known as Mahameru, has erupted many occasions in the last two centuries. Still, as is the case with many of the 129 active volcanoes in Indonesia, thousands of residents still to reside on its fertile slopes.
Semeru’s previous significant explosion was in late 2021, when 51 individuals were killed and hundreds more were burned and villages were buried in thick mud. The event forced the relocation of more than 10,000 residents from their homes.
Indonesia, an island chain of more than 280 million inhabitants, is located along the Pacific “ring of fire”, a curved series of fault lines, and is prone to seismic events and volcanic activity.