Bob Moler's Ephemeris Blog

NOAA Space Weather Prediction Center has issued a warning:

2013-03-15 18:14 UTC  G2 (Moderate) Geomagnetic Storm Expected

An Earth-directed coronal mass ejection (CME) was observed in conjunction with an R1 (Minor) solar flare radio blackout in the early hours of March 15^th.  This CME is expected to arrive late on March 16^th, with G1 (Minor) geomagnetic storming forecast for the 16^th and G2 (Moderate) storming forecast for the 17^th.  Stay tuned for updates.

A geomagnetic storm produces aurorae (auroras or northern and southern lights).  The more intense the aurora the farther toward the equator it will appear.

A tip o’the old sunscreen to SpaceWeather.com for the heads up.  You can sign up for alert emails from them too.