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© Ersa/XinhuaVolcanic materials spew from Mount Semeru in Lumajang, East Java province, Indonesia, on April 7, 2026.
Mount Semeru, located in Indonesia's East Java province, erupted again on Tuesday (April 7), spewing a massive hot cloud into the sky, according to the Centre for Volcanology and Geological Hazard Mitigation, reported Xinhua.

The volcano remains under a Level III alert, the second-highest in the country's four-tier warning system.

The eruption at 5.30 pm local time produced an ash column reaching approximately 2,000 metres above the crater, with a thick gray plume drifting north-east and east. Seismographs recorded the event as lasting more than seven minutes.

No casualties or immediate damage were reported, but authorities warned that the accumulation of volcanic material on the slopes could trigger debris flows, or lahars, if heavy rainfall occurs.

This follows a restless Monday during which the volcano recorded several separate eruptions.

Bernama-Xinhua