Partial collapse at Mount Merapi sends lava down slopes, Indonesia

A partial collapse occurred at Mount Merapi volcano, Central Java Province, Indonesia, on November 10, 2025, producing lava flows on its slopes. The event follows continuous volcanic activity observed in recent days, including a pyroclastic flow that traveled about 1 500 m (4 921 feet) southwest at 15:19 LT (08:19 UTC) on November 9, lasting 188.32 seconds. The volcano remains at Alert Level III (Siaga), and residents are advised to follow official safety recommendations.

Mount Merapi, one of Indonesia’s most active volcanoes, experienced a partial collapse on November 10. The collapse generated lava flows down the volcano’s flanks, consistent with its ongoing dome-building activity.

On the previous day, a pyroclastic flow occurred at 15:19 LT (08:19 UTC) on November 9, extending approximately 1 500 m (4 921 feet) southwest and lasting 188.32 seconds, according to the Center for Volcanology and Geological Hazard Mitigation (PVMBG).

These events are within Merapi’s typical eruptive behavior pattern, which includes frequent dome growth and collapse cycles.

PVMBG maintains the volcano’s alert status at Level III (Siaga), indicating high activity. The public has been advised to stay outside the designated hazard zones and comply with official safety guidance.

Merapi’s current behavior continues its long-term pattern of near-continuous degassing, lava extrusion, and periodic dome collapse. The volcano’s frequent pyroclastic flows pose significant risks to nearby communities, though no immediate damage reports were received following this event.

Featured image: afarTV

Teo Blašković

I'm a dedicated researcher, journalist, and editor at The Watchers. With over 20 years of experience in the media industry, I specialize in hard science news, focusing on extreme weather, seismic and volcanic activity, space weather, and astronomy, including near-Earth objects and planetary defense strategies. You can reach me at teo /at/ watchers.news.

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