An impulsive C2.1 X-ray flare erupted from active region 11793. This is an earth facing location.
|C2.1 X-ray Flare.|
What is a flare anyway? A flare is a sudden brightening of the sun's surface. It effects the sun in all the levels and in all of the electromagnetic frequencies including the X-rays.
The chart overlaid on the image to the left is from NOAA/Space Weather Prediction Center which has a very sensitive satellite that records X-rays and relays data to earth. The Levels are Categorized by intensity A, B, C for Common, M for Moderate and X for Extreme. Within each level there are 9.9 smaller levels So Each flare receives a letter and number designation. Each level is 10 times stronger than the one before, on a logarithmic progression.
The Purple inset image is an optical X-ray
monitor from the ACE spacecraft and gives us more information on where the X Ray is coming from and the Green image is From NASA SDO spacecraft and this particular filter 094 is the most sensitive to X-Rays of all the filters. All that said, words do not do justice to what a flare is when you can see it in action.