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 Aug 01 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 Aug 01-Aug 03 2026 is 5.67 (NOAA Scale
G2).
NOAA Kp index breakdown Aug 01-Aug 03 2026
Aug 01 Aug 02 Aug 03
00-03UT 3.00 4.00 3.33
03-06UT 2.33 4.33 4.00
06-09UT 2.00 5.67 (G2) 3.00
09-12UT 1.33 4.33 2.33
12-15UT 3.00 5.00 (G1) 3.00
15-18UT 3.00 3.00 1.00
18-21UT 3.67 1.67 1.00
21-00UT 4.00 1.67 0.67
Rationale: G1-G2 (Minor-Moderate) geomagnetic storms are likely on 02
Aug due to the anticipated arrival of CME that left the Sun on 30 Jul.
B. NOAA Solar Radiation Activity Observation and Forecast
Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
above S-scale storm level thresholds (S1 - Minor level).
Solar Radiation Storm Forecast for Aug 01-Aug 03 2026
Aug 01 Aug 02 Aug 03
S1 or greater 75% 25% 10%
Rationale: S1 (Minor) solar radiation storms are expected on 01 Aug.
There is a chance for S1 (Minor) radiation storms on 02 Aug and a slight
chance on 03 Aug.
C. NOAA Radio Blackout Activity and Forecast
No radio blackouts were observed over the past 24 hours.
Radio Blackout Forecast for Aug 01-Aug 03 2026
Aug 01 Aug 02 Aug 03
R1-R2 35% 35% 35%
R3 or greater 5% 5% 5%
Rationale: There is a chance for R1 (Minor) radio blackouts on 01-03
Aug.
