IRIS Movie of the Day
At least once a week a movie of the Sun taken by NASA's Interface Region Imaging Spectrograph (IRIS) is posted by one of the scientists operating the instrument.
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16 Nov 2017
Four homologous eruptions
Credit: IRIS, LMSAL/NASA, Jean-Pierre Wuelser
The movie shows four small eruptions, one after the other, within a four hour time period. All eruptions start in the same location and look quite similar to each other. Repeated eruptions often happen when new magnetic flux emerges from below the surface of the sun for many hours and interacts with the existing magnetic field above.