Thermal Cameras Keep a Cool Eye on Hot Lava

Side-by-side images from the Hawaiian Volcano Observatory's Thermal Web Camera (HTcam) located on the rim of Halema‘uma‘u before (left) and after (right) lava veneer from the vent wall fell into the lake on July 28, 2017. The collapse scar is circled at right. You can follow the changing lava lake activity, as seen through the eyes of a thermal camera, on HVO's website at https://volcanoes.usgs.gov/vsc/captures/kilauea/htcam.jpg. USGS images.