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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Friday, April 20, 2018 16:06:10

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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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Auroral Prediction
NWS Spring Safety Website
Friday, April 20, 2018 11:29 UTC

Update:  A G1 (Minor) geomagnetic storm warning has been issued for 20 April 2018 and is valid until 20/1800 UTC (14:00 ET).

Friday, April 20, 2018 11:03 UTC

A G2 (Moderate) geomagnetic storm warning has been issued until 12:00 UTC (08:00 ET) on 20 April.

Friday, April 06, 2018 17:53 UTC

In the coming months SWPC will be modernizing its dissemination services to improve customer service.

Thursday, March 01, 2018 16:32 UTC

Learn about spring weather hazards and safety by visiting the NWS Spring Safety website.

Serving Essential Space Weather Communities

The Sun's X-Rays

Solar X-Ray Imager Image

Coronal Mass Ejections

LASCO C3 Coronagraph Image

The Aurora

Aurora ovation plot

GOES X-Ray Flux

GOES X-Ray flux plot

GOES Proton Flux

GOES Proton Flux plot

Estimated Planetary K-Index

Planetary K Index plot