NOAA Logo

NWS Logo

Organizations

Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Saturday, November 23, 2024 19:45:38

Main menu

NOAA Scales mini

minimize icon
Space Weather Conditions
on NOAA Scales
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
on NOAA Scales
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

G2 (Moderate) Geomagnetic Storms Observed on 20 December

Aurora Forecast
G2 (Moderate) Geomagnetic Storms Observed on 20 December
published: Sunday, December 20, 2015 22:55 UTC

An enhanced solar wind environment and prolonged period of southward magnetic field, associated with the passage of a coronal mass ejection, has caused planetary G2 (Moderate) geomagnetic storms.  G2 storm levels were first observed at 20/0519 UTC (0019 EDT) and G2 (Moderate) geomagnetic storm conditions are expected to persist until 1000 UTC (0500 EDT) on 20 December as this event continues.