Lava lake activity from inside Halema`uma`u Crater
Lava lake activity from inside Halema`uma`u CraterSounds of lava lake activity within Kilauea Volcano's summit vent inside Halema`uma`u Crater on the afternoon of February 14, 2011. The continuous "crashing wave" noise is the sound of churning lava as gases are released from the lake surface, which is in nearly constant motion.