Alert Level Increased at World’s Largest Volcano in Hawaii

Federal officials raised the alert level Tuesday for the world’s largest active volcano, Hawaii’s Mauna Loa, which last erupted in 1984.

Hawaii's Mauna Loa volcano, background, towers over the summit crater of Kilauea volcano in Hawaii Volcanoes National Park on the Big Island on April 25, 2019. Caleb Jones/Photo AP

HONOLULU—Federal officials raised the alert level Tuesday for the world’s largest active volcano, Hawaii’s Mauna Loa, which last erupted in 1984.

The U.S. Geological Survey changed the level from “normal” to “advisory” following a steady increase in earthquakes and ground swelling that began in March.