Greatest heat output for a volcano

On 28 January 2015, the journal Geophysical Research Letters published a paper by a team of US and UK geologists in which they analysed satellite data of the thermal flux from Earth’s 95 most active volcanoes. They used observations by the spectroradiometers on board NASA’s Terra and Aqua Earth-monitoring satellites between 2000 and 2014. Over that period, Hawaii’s Kīlauea volcano emitted 9.8 x10¹⁶ joules of thermal energy.

Coming in second place was the lava lake at Nyiragongo in the Democratic Republic of the Congo (the world's largest lava lake), which emitted 9.5 x10¹⁶ joules.