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Video: At 10:28 a.m. HST this morning (April 6), rock falls from the Overlook crater wall into Kīlauea Volcano's summit lava lake triggered an explosive event. This video, taken by the K2cam, shows a dark pulsing plume of ash and debris. The explosion hurled spatter (molten lava fragments) and lithic blocks (older crater wall) onto the rim at the old visitor overlook and to the southwest. This area is closed to the public due to volcanic hazards such as today's event.