LASCO C2 and LASCO C3 - Wednesday MARCH 7, 2012 at 4PM CT

http://sohowww.nascom.nasa.gov/data/LATEST/

LASCO Large Angle and Spectrometric Coronagraph - Wikipedia, the free encyclopedia

https://en.wikipedia.org/wiki/LASCO_Large_Angle_and_Spectrometric_Coronagraph

The Large Angle and Spectrometric Coronagraph (LASCO) is one of a number of instruments aboard the Solar and Heliospheric Observatory satellite (SOHO). LASCO consists of three solar coronagraphs with nested fields of view.