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Published on Apr 22, 2011
On April 19, 2011 there was another very beautiful prominence eruption at a similar location as the famous "First Light Prominence Eruption" from March 30, 2010.
This AIA data is from April 19, 2011, showing a wavelength band that is centered around 304 Å. This extreme ultraviolet emission line is from singly ionized Helium, or He II, and corresponds to a temperature of about 50,000 degrees Celsius.