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 Mar 31 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 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Mar 31-Apr 02 2026 is 5.67 (NOAA Scale
G2).

NOAA Kp index breakdown Mar 31-Apr 02 2026

             Mar 31       Apr 01       Apr 02
00-03UT       3.67         5.00 (G1)    2.67     
03-06UT       3.00         4.67 (G1)    2.67     
06-09UT       2.67         4.33         2.00     
09-12UT       2.00         4.00         1.67     
12-15UT       4.67 (G1)    3.00         1.67     
15-18UT       5.67 (G2)    2.67         1.33     
18-21UT       5.67 (G2)    2.00         1.67     
21-00UT       5.00 (G1)    2.33         1.67     

Rationale: Enhancements are likely to reach G2 (Moderate) levels midday
to late on 31 Mar, with a chance for G3 (Strong) storm levels due to
possible CME effects from the 30 Mar X1.4 major flare event. Active to
G1 (Minor) levels are then expected into 01 Apr due to continued CH HSS
and CME effects.

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 Mar 31-Apr 02 2026

              Mar 31  Apr 01  Apr 02
S1 or greater   50%     50%     25%

Rationale: The greater than 10 MeV proton flux is likely to exceed event
levels (S1/Minor) on 31 Mar through 02 Apr.

C. NOAA Radio Blackout Activity and Forecast

Radio blackouts reaching the R3 levels were observed over the past 24
hours. The largest was at Mar 30 2026 0319 UTC.

Radio Blackout Forecast for Mar 31-Apr 02 2026

              Mar 31        Apr 01        Apr 02
R1-R2           55%           55%           55%
R3 or greater   10%           10%           10%

Rationale: Solar activity is expected to be low with M-class flares
(R1-R2/Minor-Moderate) likely through 02 Apr and a slight chance of
X-class flares (R3/Strong) through 02 Apr.