NOAA Logo

NWS Logo

Organizations

Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Sunday, January 21, 2018 22:09:40

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

G1 (Minor) Watch issued for 6 January 2016

CH HSS to connect with Earth on 6 Jan - G1 conditions likely
G1 (Minor) Watch issued for 6 January 2016
published: Thursday, January 07, 2016 00:54 UTC

A recurrent coronal hole high speed stream (CH HSS) is expected to become geoeffective with Earth late on 6 January, 2016, and the geomagnetic response is likely to reach G1 (Minor) storming levels. Solar wind speeds from this recurrent CH HSS reached over 650 km/s last rotation (about 27 days ago) and measurements from the STEREO-A spacecraft approximately 2 weeks ago observed similar speeds.