Kilauea Volcano’s summit eruption in Halemaumau Crater began in March 2008. Since that time, countless changes have occurred. The crater enclosing the lava lake (called the Overlook crater) has enlarged through rockfalls, and explosions have thrown spatter around the crater and onto the rim of Halemaumau itself. The lava-lake level has fluctuated, leading to several overflows of lava onto the Halemaumau Crater floor.
A sliver of the north wall of the Overlook vent within Halemaumau Crater collapsed early Tuesday, the U.S. Geological Survey Hawaiian Volcano Observatory reports.