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
Solar Wind
3-day Solar-Geophysical Forecast
:Product: 3-Day Forecast :Issued: 2025 Jul 15 1230 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 5 (NOAA Scale G1). The greatest expected 3 hr Kp for Jul 15-Jul 17 2025 is 5.00 (NOAA Scale G1). NOAA Kp index breakdown Jul 15-Jul 17 2025 Jul 15 Jul 16 Jul 17 00-03UT 4.00 4.00 3.00 03-06UT 4.33 3.67 2.67 06-09UT 5.00 (G1) 3.00 2.00 09-12UT 4.67 (G1) 2.67 1.67 12-15UT 4.67 (G1) 2.33 2.00 15-18UT 2.67 2.00 2.00 18-21UT 2.33 2.33 1.67 21-00UT 3.67 2.67 2.00 Rationale: G1 (Minor) geomagnetic storming is expected on 15 Jul due to persistent CH HSS 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 Jul 15-Jul 17 2025 Jul 15 Jul 16 Jul 17 S1 or greater 1% 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 No radio blackouts were observed over the past 24 hours. Radio Blackout Forecast for Jul 15-Jul 17 2025 Jul 15 Jul 16 Jul 17 R1-R2 50% 50% 50% R3 or greater 5% 5% 5% Rationale: Solar activity is expected to be low with an increased chance for M-class flares (R1-R2, Minor-Moderate) on 15-17 Jul.