Fwd: ALERT: Geomagnetic K-index of 5 (G1) -- Threshold Reached: 2012Apr 23 1937 UTC

Space Weather Message Code: ALTK05
Serial Number: 683
Issue Time: 2012 Apr 23 1937 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2012 Apr 23 1937 UTC
Synoptic Period: 1800-2100 UTC

Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/NOAAscales

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.

http://spaceweather.com/images2012/2...61adnl4n tbl3

Space Weather Message Code: ALTK06
Serial Number: 284
Issue Time: 2012 Apr 24 0047 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2012 Apr 24 0046 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/NOAAscales

Potential Impacts: Area of impact primarily poleward of 55 degrees
Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude
power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased
drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to
Washington state.