MOUNT IBU - GEOGRAPHY
News: Indonesia's Mt. Ibu erupts,
spewing ash clouds
What's in the news?
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The Ibu volcano in Indonesia has erupted, prompting authorities to warn locals and
tourists to stay away from the area.
Mount Ibu:
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Ibu is one of Indonesia’s most active volcanoes,
erupting more than 21,000 times last year.
Key takeaways:
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It is a stratovolcano
at the north-west coast of Halmahera
Island, Indonesia.
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Stratovolcanoes are formed from viscous, sticky
lava that does not flow easily, have steeper sides and are more cone-shaped
than shield volcanoes.
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The summit is truncated and contains nested craters.
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The inner crater is 1 km wide and 400m deep and the
outer is 1.2 km wide.
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A large parasitic cone is at the north-east of the
summit and a smaller one at the south-west.
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A group of
maars is located below the N and W flanks.
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Maar is a low-relief, broad volcanic crater formed
by shallow explosive eruptions.
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The first observed and recorded eruption was in
1911.
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Eruptive activity began again in December 1998,
producing a lava dome that covered the floor of the inner summit crater along
with ongoing ash emissions.