NOAA Logo

NWS Logo

Organizations

Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Wednesday, November 27, 2024 11:50:18

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

Shock Arrival at ACE

Shock Arrival at ACE
published: Friday, January 01, 2016 16:06 UTC

An interplanetary shock arrived at the ACE satellite on 31 Dec/0002 UTC (30 Dec/1702 EST) associated with the expected arrival of the 28 Dec coronal mass ejection (CME). At 31/0051 UTC, magnetometers around the globe recorded a geomagnetic sudden impulse ranging in strength from about 20-35 nT signaling the arrival of the CME at Earth. Magnetometers are currently recording unsettled to active conditions. A G1 (Minor) Warning is currently in effect along with a G3 (Strong) Watch for 31 December. Stay tuned here for further updates as this event evolves.