Jakarta, Indonesia - Indonesian authorities on Tuesday ordered the evacuation of nearly 30,000 people from the rumbling slopes of Mount Kelud, warning of an imminent eruption from the volcano that killed thousands in 1919.
Kelud has been rumbling for weeks and scientists have placed it on the highest alert level, meaning they believe a major eruption is imminent.
One of the most active volcanoes in Indonesia, it last erupted in 1990 and is located on Java island, about 620 kilometres east of the capital, Jakarta,
The volcano's explosive activity typically starts with a steam explosion - when surfacing magma meets ground water. Such eruptions produce hot mud flows, pyroclastic surges and flows.
Indonesia sits on the so-called Pacific "Ring of Fire" - a string of volcanoes and fault lines stretching from the Western Hemisphere through Japan and Southeast Asia.
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