world's largest active volcano Mauna Loa erupts after 38 years

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Sky full of smoke and bright red glow before volcanic eruption

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Mauna Loa erupted at 11:30 a.m. on Sunday, according to locals

The federal agency has designated the volcano alert level as "alert,"

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Mauna Loa makes up about 51% of the island of Hawaii

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Mauna Loa has erupted 33 times since written records of eruptions began in 1843

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The last time Mauna Loa erupted was in March 1984 and lasted for three weeks

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Mauna Loa is also spewing large amounts of lava, which can be dangerous.

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