May 13, 2021—Kīlauea summit eruption thermal map compilation

This compilation shows nine selected thermal maps created for the ongoing eruption in Halema‘uma‘u, at the summit of Kīlauea, which began on December 20, 2020. The maps show the rapid emplacement and growth of the lake in the initial days. The main island shifts and rotates, presumably controlled by the lake currents. In mid-January, the eastern portion of the lake became solidified at the surface, with active surface lava limited to a diminishing area in the western portion of the lake, near the western fissure. By May 13, active surface lava was less than one percent of the total lake area. The declining area of active lava corresponds with a reduction in eruption rates and gas emissions. The color range shows the relative temperatures across the lake, with blue colors indicative of cooler temperatures and red colors indicative of warmer temperatures. USGS maps by M. Patrick and B. Carr.