"CANNIBAL CME" WTF?

G3 GEOMAGNETIC STORM WATCH: NOAA forecasters have raised the level of an ongoing geomagnetic storm watch to category G3. This would be a strong storm starting during the early hours of March 31st when a 'Cannibal CME' is expected to hit Earth's magnetic field. Details @ Spaceweather.com

Just received this email. I no longer have an account, but they still send me notices. I couldn't obtain anything further thru the website without paying a monthly subscription