Mount Semeru

April 9, 2026

Recently the Mount Semeru in Indonesia erupted multiple times and sent thick columns of ash up to 1,100 metres above its summit.

About Mount Semeru:

Location: It is located in East Java, Indonesia.
It is one of the most active volcanoes in Indonesia.
It is positioned within a subduction zone, where the Indo-Australian plate subducts beneath the Eurasia plate.
It is the highest peak on Java Island and sits on the Pacific “Ring of Fire”.
It lies at the southern end of a volcanic massif extending north to the Tengger caldera.
Summit topography is complicated by the shifting of craters from NW to SE.
Semeru, also known as Mahameru, has erupted numerous times in the past.

Source : Indonesia’s Mount Semeru erupts repeatedly, sending ash 1,100 metres into sky

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