A March 6 U.S. Geological Survey image shows lava pouring from the Pu'u O'o vent on Kilauea volcano in Hawaii. (AFP/Getty Images)

The crater floor collapsed Saturday, causing new eruptions along the east rift zone. (Tim Wright/AP)

Scientists fly in a helicopter above the Pu'u O'o vent on Kilauea Volcano on Sunday. (Tim Wright/AP)