G1-Minor geomagnetic storm in progress

A G1-Minor geomagnetic storm is currently in progress due to the influence of a recurrent negative polarity coronal hole high speed stream (CH HSS). 

Geomagnetic K-index of 5 (G1) threshold was reached at 02:31 UTC on February 24, 2015. Area of impact is primarily poleward of 60 degrees Geomagnetic Latitude. 

Weak power grid fluctuations can occur under G1 conditions. Minor impact on satellite operations is possible. Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. 

Space Weather Message Code: ALTK05
Serial Number: 769
Issue Time: 2015 Feb 24 0231 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2015 Feb 24 0231 UTC
Synoptic Period: 0000-0300 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Solar wind parameters are expected to remain enhanced over the next three days (February 24 – 26) due to CH HSS influence .

Geomagnetic field activity is expected to be at quiet to unsettled levels with a slight chance for active periods due to CH HSS influence for the next three days.

Featured image: Probability of visible aurora at 05:05 UTC on February 24, 2015. Image credit: SWPC