Juno's JIRAM (Jovian Infrared Auroral Mapper) Captures Hots Spots on Io
The bright spots in the animation indicate locations with higher temperatures caused by volcanic activity, including an area with such a strong signal that it saturated the sensor.
https://www.jpl.nasa.gov/images/pia26594-junos-jiram-captures-hots-spots-on-io/
Credit: NASA/JPL/SwRI/ASI - JIRAM Team (A.M.)