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When did Mauna Loa last erupt?

Mauna Loa, an active shield volcano located in the south-central portion of the island of Hawaii in the United States, last erupted in 2022. Prior to that, its most recent eruptions occurred in 1984, 1975, and 1950. Mauna Loa’s first well-documented eruption occurred in 1843, and since then has erupted about three dozen times.