NOAA Logo

NWS Logo

Organizations

Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Thursday, November 23, 2017 18:11:55

Main menu

NOAA Scales mini

minimize icon
Space Weather Conditions
24-Hour Observed Maximums
R
no data
S
no data
G
no data
Latest Observed
R
no data
S
no data
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
maximize icon
R
no data
S
no data
G
no data
Current Space Weather Conditions
R1 (Minor) Radio Blackout Impacts
close
HF Radio: Weak or minor degradation of HF radio communication on sunlit side, occasional loss of radio contact.
Navigation: Low-frequency navigation signals degraded for brief intervals.
More about the NOAA Space Weather Scales

UPDATE: G2 (Moderate) Geomagnetic Storm Warning Expired

UPDATE: G2 (Moderate) Geomagnetic Storm Warning Expired
published: Thursday, January 22, 2015 16:39 UTC

A G2 (Moderate) geomagnetic storm warning has been issued in response to some enhanced solar wind ahead of the next coronal hole high speed stream (this enhancement is well-reflected in the top panel of this ACE data plot near the start of the day on Jan. 21st).  Coronal holes can create an enhanced structure ahead of their arrival, called a Co-rotating Interaction Region (CIR) in scientific terms, and these features can drive low to mid-level geomagnetic storming.  No periods of storming have been observed so far but storming in the near term is possible.  

***UPDATE: Conditions no longer warrant a G2 (Moderate) geomagnetic storm warning. Solar wind conditions are expected to remain enhanced, but are expected to remain below the G1-Minor storm threshold for the time being. Stay tuned for updates.***