Wave of Ionization Sweeps Earth After Solar Flare


Ultraviolet radiation swept Earth’s upper atmosphere on February 18, following an M1.9 class flare the preceding day. The flare came from new sunspot AR1675; it was the most intense flare of 2013 so far, although it did not produce a cornoal mass ejection.

Here it is, in a range of wavelengths:


Leave a Reply

Your email address will not be published. Required fields are marked *