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Gallery|In Pictures

Indonesia’s Mount Semeru unleashes ash and rivers of lava

Tens of thousands of people live on Semeru’s slopes, just like many of the 128 other active volcanoes in Indonesia.

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Mount Semeru spews volcanic materials to the air as people look on
Mount Semeru spews deadly clouds of hot gases and rivers of lava on the island of Java on December 4, 2022. [Stringer/EPA-EFE]
Published On 4 Dec 20224 Dec 2022

Indonesia’s highest volcano, Mount Semeru, has erupted, releasing searing gas clouds and rivers of lava and prompting authorities to raise their volcano alert to its highest level.

Nearly 2,000 people in the densely populated island of Java have been evacuated from villages close to the peak. Sunday’s eruption blanketed several villages with falling ash, which blocked out the sun, but no casualties have been reported.

Increased volcanic activity on Sunday afternoon caused authorities to widen the danger zone around Semeru to 8km (5 miles) from the crater, said Hendra Gunawan, who heads the Center for Volcanology and Geological Hazard Mitigation.

He advised locals to keep away from the volcano’s southeastern sector along the Besuk Kobokan River, which is in the path of the lava flow.

Semeru’s last major eruption was in December last year when it killed 51 people and buried villages in layers of mud. Several hundred people suffered serious burns, and more than 10,000 people were evacuated.

Semeru, also known as Mahameru, has erupted numerous times in the past 200 years. Still, as is the case with many of the 129 active volcanoes in Indonesia, tens of thousands of people continue to live on its fertile slopes.

Indonesia, an archipelago nation of more than 270 million people, sits along the Pacific “Ring of Fire”, a horseshoe-shaped series of fault lines that is prone to earthquakes and volcanic activity.

Mount Semeru spews smoke and ash.
East Java's Mount Semeru killed 51 people in its previous eruption a year ago. [Agus Harianto/AFP]
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volcanic materials from Mount Semeru volcano hitting a brigde following an eruption
Volcanic materials from Mount Semeru hit a bridge in East Java. [National Disaster Mitigation Agency/EPA-EFE]
A rescuer evacuates an elderly resident
A rescue worker evacuates an elderly Indonesian who lives near the volcano. [Antara Foto/National Disaster Mitigation Agency/Reuters]
Pyroclastic flow rolls down the slope of Mount Semeru
Mount Semeru is among 129 active volcanoes in Indonesia. [AP]
People carry their belongings as they arrive at a school turned into temporary shelter
People carrying their belongings arrive at a school that has been turned into a temporary shelter for those affected by the eruption. [Hendra Permana/AP]
Villagers watch hot smoke from the ground
Locals watch hot smoke rise from the ground at Curah Kobokan village after Sunday's eruption. [Aman Rochman/AFP]
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People take temporary shelter in a room at a school following Mount Semeru's volcanic eruption
People who have fled the eruption take shelter in a schoolroom in Lumajang, East Java. [Putri/AFP]
Rescuers monitor the flow of volcanic materials
Emergency workers monitor the flow of volcanic materials from the eruption on December 4, 2022. [Hendra Permana/AP]

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