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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Saturday, April 05, 2025 17:18:35 UTC

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NOAA Scales

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Space Weather Conditions
on NOAA Scales
24-Hour Observed Maximums
R
none
S
none
G2
moderate
Latest Observed
R
none
S
none
G
none
Predicted 2025-04-05 UTC
R1-R2 65%
R3-R5 15%
S1 or greater 10%
G
none
Predicted 2025-04-06 UTC
R1-R2 60%
R3-R5 10%
S1 or greater 5%
G
none
Predicted 2025-04-07 UTC
R1-R2 55%
R3-R5 10%
S1 or greater 5%
G
none
1
2
3
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R
none
S
none
G
none
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

Space Weather Summary

  • Solar Wind Speed: 575 km/sec
  • Solar Wind Magnetic Fields: Bt 8 nT, Bz -4 nT
  • Noon 10.7cm Radio Flux: 180 sfu

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New Solar Cycle Plots Available!
NOAA Safeguards Satellites!
New Solar Cycle Plots Available!
Monday, March 31, 2025 20:30 UTC

These new solar cycle plots will provide more accurate predictions for solar cycle 25 (SC25).

*NEW UPDATE*: Coronagraph Images and Data from GOES-19 Availability Expanded
Wednesday, March 19, 2025 20:16 UTC

Since February 25, 2025, the Space Weather Prediction Center has presented new coronagraph images and data from the GOES-19 Compact Coronagraph-1 (CCOR-1). 

Safeguarding Satellites: How NOAA Monitors Space Weather to Prevent Disruptions
Friday, February 21, 2025 16:43 UTC

Read the full story here

New Preliminary Coronagraph Images from GOES-19
Thursday, February 06, 2025 22:38 UTC

Beginning February 6, 2025, the Space Weather Prediction Center is presenting new coronagraph images from the GOES-19 Compact Coronagraph-1 (CCOR-1). 

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

Created with Highcharts 8.0.4SWPC Warning ThresholdABCMXChart context menuUpdated 2025-04-0517:15 UTCZoom6 Hour1 Day3 Day7 DayApr 4Apr 6

GOES Proton Flux

Created with Highcharts 8.0.4SWPC 10 MeV Warning ThresholdChart context menuUpdated 2025-04-0517:10 UTCZoom6 Hour1 Day3 Day7 DayApr 4Apr 6
Created with Highcharts 8.0.4Universal TimeKp indexChart context menuEstimated Planetary K index (3 hour data)Apr 3Apr 4Apr 503:0006:0009:0012:0015:0018:0021:0003:0006:0009:0012:0015:0018:0021:0003:0006:0009:0012:0015:0018:0021:00Apr 601234567890123456789Space Weather Prediction CenterBegin: Thu, 03 Apr 2025 00:00:00 GMT
Updated Time: 2025-04-05T12:00:00.000Z
NOAA Scales Geomagnetic Storms
Kp < 5 Kp = 5 (G1) Kp = 6 (G2) Kp = 7 (G3) Kp = 8, 9- (G4) Kp = 9o (G5)