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loveisamyth 68M
849 posts
3/27/2015 7:41 am

Last Read:
3/29/2015 8:44 am

CO-ROTATING INTERACTION REGION


NOAA forecasters estimate a 35% chance of polar geomagnetic storms on March 27th when a co-rotating interaction region (CIR) is expected to hit Earth's magnetic field. CIRs are transition zones between fast and slow moving solar wind streams. Solar wind plasma piles up in these regions, producing density gradients and shock waves that do a good job of sparking auroras.