Geomagnetic Storm Expected Tuesday, Jan 23

http://www.nasawatch.com/images/latest_sxi.jpg
As the strongest Solar Radiation Storm (S3) since May, 2005 continues, the associated Earthward-directed Coronal Mass Ejection is expected to arrive about 1400 UT (9am EST) Jan 24.
SWPC has issued a Geomagnetic Storm Watch with G2 level storming likely and G3 level storming possible, with the storm continuing into Wednesday, Jan 25.
All of this activity is related to a moderate (R2) Radio Blackout x-ray flare that erupted Sunday night (11pm EST).