Thermal movie showing a view inside the Halema`uma`u vent cavity

movie shows a view into the Halema`uma`u vent cavity with a thermal camera. To the naked eye, the vent is entirely obscured by thick fume, but the thermal camera can 'see' through much of this and provide views of the cavity interior. These views show four puffing holes on the floor of the cavity. North is to the right. The 3:13am explosion originated from one of the southerly holes.