Space Weather Prediction Center

National Oceanic and Atmospheric Administration

https://services.swpc.noaa.gov
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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
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R
no data
S
no data
G
no data
Current Space Weather Conditions
on NOAA Scales
R1 (Minor) Radio Blackout Impacts
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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
  • Solar Wind Speed: km/sec
  • Solar Wind Magnetic Fields: Bt nT, Bz nT
  • Noon 10.7cm Radio Flux: sfu
UPDATE on G3 Watch for 4-5 June UTC Days
Thursday, June 04, 2026 02:07 UTC
The current forecast calls for combined CME arrival around mid-afternoon EDT of June 4, with up to G3 levels possible afterwards. CME passage would likely continue into the evening and possibly overni...
Strong Geomagnetic Storm (G3) Watch In Effect for 04-05 June (UTC)
Wednesday, June 03, 2026 21:17 UTC
Strong Geomagnetic Storm (G3) Watch In Effect for 04-05 June (UTC) with three CMEs expected to interact with Earth....
R2 Conditions Reached on 03 June
Wednesday, June 03, 2026 03:22 UTC
R2 radio blackout conditions occurred on 03 June due to an isolated class M9.5 solar flare from Region 4455 near the center disk in the Sun's northern hemisphere. A particle event from this flare is u...
R1 Conditions Return with Low-level M-class Flares
Tuesday, June 02, 2026 20:43 UTC
R1 radio blackout conditions occurred on June 2nd due to isolated M-class flares from Regions 4461 on the southeast limb and 4455 near center disk. The largest of these events was an M3.3 flare from A...

The Sun (EUV)

Solar Ultraviolet Image 195 Å (Angstrom)
Solar Ultraviolet Image 94 Å (Angstrom)
Solar Ultraviolet Image 131 Å (Angstrom)
Solar Ultraviolet Image 171 Å (Angstrom)
Solar Ultraviolet Image 284 Å (Angstrom)
Solar Ultraviolet Image 304 Å (Angstrom)
Solar Ultraviolet Image Thematic Map

The Aurora

Aurora ovation plot
South Auroral Forecast Image

Coronal Mass Ejections

CCOR-1 Coronagraph Image
LASCO C2 Coronagraph Image
LASCO C3 Coronagraph Image

GOES X-Ray Flux

GOES Proton Flux

Planetary K Index

Updated Time:
NOAA Scales Geomagnetic Storms
Kp < 5 Kp = 5 (G1) Kp = 6 (G2) Kp = 7 (G3) Kp = 8, 9- (G4) Kp = 9o (G5)