The Sun erupted with one of the biggest prominences in years. This shot from the SOHO spacecraft on April 13, 2010 at 13:13 UT shows a Coronal Mass Ejection from the Sun's northeastern limb. The massive plasma-filled structure rose up and burst during a ~2 hour period around 0900 UT.
A typical coronal mass ejection can release 100 billion kilograms of solar material, and the speed of this material can approach 1000 km/second. In fact, solar flares and coronal mass ejections are the biggest explosions in the Solar System, approaching the power of one billion hydrogen bombs.
Here is the Video Which can help you understand what exactly happened.