Solar Information
Solar images from SOHO
The Sun Now
Extreme ultraviolet Imaging Telescope image at 284 Angstrom (to 2 million degrees K)
Michelson Doppler Imager (MDI) image showing sunspots
Magnetogram image showing magnetic field, black and white show opposite polarities
Information from the Space Weather Prediction Center, Boulder, CO
National Oceanic and Atmospheric Administration (NOAA)
Aurora Activity
Solar Cycle
Sun Spot Number Progression
Last 5 cycles Sun Spot Number Progression
Solar Wind
3-day Solar-Geophysical Forecast
:Product: 3-Day Forecast
:Issued: 2026 Apr 10 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
A. NOAA Geomagnetic Activity Observation and Forecast
The greatest observed 3 hr Kp over the past 24 hours was 2 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Apr 10-Apr 12 2026 is 5.33 (NOAA Scale
G1).
NOAA Kp index breakdown Apr 10-Apr 12 2026
Apr 10 Apr 11 Apr 12
00-03UT 3.33 5.33 (G1) 4.33
03-06UT 5.00 (G1) 4.00 3.67
06-09UT 4.33 4.00 2.67
09-12UT 3.67 3.33 2.33
12-15UT 2.67 3.67 3.00
15-18UT 2.67 4.00 2.33
18-21UT 2.67 4.67 (G1) 3.00
21-00UT 4.33 4.67 (G1) 3.33
Rationale: G1 (Minor) storm levels are likely over 10-11 Apr due to the
influence of a +CH HSS.
B. NOAA Solar Radiation Activity Observation and Forecast
Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.
Solar Radiation Storm Forecast for Apr 10-Apr 12 2026
Apr 10 Apr 11 Apr 12
S1 or greater 5% 1% 1%
Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.
C. NOAA Radio Blackout Activity and Forecast
Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at Apr 09 2026 0845 UTC.
Radio Blackout Forecast for Apr 10-Apr 12 2026
Apr 10 Apr 11 Apr 12
R1-R2 25% 5% 5%
R3 or greater 1% 1% 1%
Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts
on 10 Apr.
