In of Kīlauea's summit lava lake, the light-colored rock in the ven...

In this photo of Kīlauea Volcano's summit lava lake, the light-colored rock in the vent wall to the left of the spattering lava shows were a rockfall occurred on January 2. The shadow of the gas plume appears as a brown streak perpendicular to the dark-colored lava on the floor of Halema‘uma‘u Crater. HVO and Jaggar Museum are visible on top of the caldera wall (upper left).