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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Friday, April 23, 2021 07:42:52

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NOAA Scales

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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
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R
no data
S
no data
G
no data
Current Space Weather Conditions
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

Space Weather Summary

  • Solar Wind Speed: km/sec
  • Solar Wind Magnetic Fields: Bt nT, Bz nT
  • Noon 10.7cm Radio Flux: sfu

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G2 Watch for 25 April, 2021
NWS Spring Weather Safety Campaign
Image advertising the Space Weather Workshop
Geospace Model Version 2.0 Begins Operations in Support of Power Grids
Thursday, April 22, 2021 19:15 UTC

A partial halo Coronal Mass Ejection (CME) was associated with a C3 flare from Region 2816 at 22/0435 UTC.

Tuesday, March 02, 2021 00:28 UTC

Spring will be here before you know it!

Wednesday, February 24, 2021 18:01 UTC

Space Weather Workshop is an annual conference that brings industry, academia, and government agencies together in a lively dialog about space weat

Tuesday, February 02, 2021 17:15 UTC

On February 3, 2021*, Geospace Model Version 2.0, which is part of the University of Michigan’s Space Weather Modeling Framework, will commence ope

Serving Essential Space Weather Communities

The Sun (EUV)

Solar Ultraviolet Image

Coronal Mass Ejections

LASCO C3 Coronagraph Image

The Aurora

Aurora ovation plot

GOES X-Ray Flux

GOES Proton Flux

Estimated Planetary K-Index

Planetary K Index plot