Halema`uma`u crusted lava surface and occasional spatter

movie shows activity of the lava surface deep within the Halema`uma`u cavity. The crusted lava surface is moving slowly from northeast to southwest, with occasional bursts of spatter from the margins and cracks. The first half of the movie is shown at actual speed, with the second half shown at x10 speed to convey the sense of movement and illustrate the oscillations of the lava surface.