Nov. 27 marks the two-year anniversary since Maunaloa, Earth’s largest active volcano, last erupted. A new study suggests ...

That's what happened two years ago with the world’s largest active volcano in Hawaii. About two months before Mauna Loa spewed lava, geologists detected small earthquakes nearby and other signals.

The last time Mauna Loa erupted was in 1984. Most of the U.S. volcanoes that scientists consider to be active are found in Hawaii, Alaska and the West Coast. Worldwide, around 585 volcanoes are ...