A comparison of a normal photograph with a thermal image of the flo...

A comparison of a normal photograph with a thermal image of the flow front. The white box shows the extent of the thermal image. The thermal image shows that most of the activity in this region is focused at the leading edge of the flow (white and yellow areas show active surface lava). In addition, a small lobe on the western margin of the flow is active (and partially obscured) in thick forest above the private lot that the front is moving through.