Michelle Coombs of the USGS described it as " very hazardous for aviation," and said her team isn't quite sure what caused Tuesday's slightly more intense ash emissions.

Officials warned residents and airplanes to stay away from part of Hawaii’s Big Island after a plume of ash from the Kilauea volcano rose 12,000 feet into the air. CNN values your feedback 1.

A plume of ash from the Kilauea volcano rose 12,000 feet into the air before dropping ash on sections of the Big Island of Hawaii, prompting officials Tuesday to warn residents to stay indoors and ...