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.
"Small" Eruption at the Solar Limb
Credit: IRIS, LMSAL/NASA, Jake Parker
Right before AR 12756 rotated around the Sun's west limb and out of IRIS' view it produced on small eruption. Despite this being "small" it ejects material away from the sun at 100+ kilometers per second (~225,000 miles per hour) and extends a length greater than Earth's diameter! See Earth in the lower right for scale. This scan through the Mg II spectral lines shows a host of other interesting features in the lower solar atmosphere including a large cool prominence below the eruption.