Fron NOAA old but interesting.
Posted by hanna on 1/11/2014, 2:57 pm
Blast from the sun unsettles Earth's magnetic field, but no storming

Forecasters at NOAA's Space Weather Prediction Center said the sun's coronal mass ejection (CME) that reached Earth on Jan. 9, unsettled the geomagnetic field but did not cause storm conditions to be reached due to the weak magnetic field. While there is still a chance we could see some geomagnetic storming that threat is greatly diminished.

The sunspot in Region 1944 that produced the eruption at 1:32 p.m. EST Tuesday, Jan. 7 has had no significant additional flaring and shows signs of decay.  

For rest of story.
http://www.noaa.gov/features/01_economic/spaceweather_3.html
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Solar Storm Jan 9th - Target, 1/9/2014, 5:33 am
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