Hawaii's Kilauea volcano is one of the most active in the world. Its eruption in 2018 was its largest in 200 years and among the costliest volcanic disasters in U.S. history. Devastating as it was to the Hawaiian landscape, Kilauea's eruption proved a boon to science. Researchers were there to collect unprecedented seismic and other data and say we might use it to understand the stresses that lead to major earthquakes.