Space Weather Observations, Alerts, and Forecast
3-day Solar-Geophysical Forecast
Product: 3-Day Forecast
- Issued: 2026 Feb 04 0030 UTC
Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center.
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 Feb 04-Feb 06 2026 is 5.00 (NOAA Scale G1).
| Feb 04 | Feb 05 | Feb 06 | |
|---|---|---|---|
| 00-03UT | 1.67 | 2.00 | 4.67 (G1) |
| 03-06UT | 1.67 | 2.00 | 4.00 |
| 06-09UT | 1.33 | 1.67 | 3.67 |
| 09-12UT | 1.33 | 1.33 | 3.67 |
| 12-15UT | 1.33 | 1.33 | 3.67 |
| 15-18UT | 1.33 | 3.00 | 4.00 |
| 18-21UT | 1.33 | 4.33 | 4.00 |
| 21-00UT | 1.67 | 5.00 (G1) | 4.00 |
Rationale: G1 (Minor) storming is likely on 05-06 Feb due to the arrival of the CME associated with the 01/2357 UTC X8.1 flare from Region 4366.
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.
| Feb 04 | Feb 05 | Feb 06 | |
|---|---|---|---|
| S1 or greater | 30% | 30% | 30% |
Rationale: The greater than 10 MeV proton flux has a chance to exceed S1 (Minor) levels over 04-06 Feb due to the high eruptive potential of Region 4366. The risk of a proton event will increase as the region moves into a more favorable magnetic connection point in the Suns western hemisphere.
Radio Blackout Activity and Forecast
Radio blackouts reaching the R3 levels were observed over the past 24 hours. The largest was at Feb 03 2026 1408 UTC.
| Feb 04 | Feb 05 | Feb 06 | |
|---|---|---|---|
| R1-R2 | 80% | 80% | 80% |
| R3 or greater | 40% | 40% | 40% |
Rationale: Moderate to high solar activity is expected due to M-class flaring (R1-R2, Minor-Moderate) for the next three days with a high chance for X-class flares (R3-Strong or greater) due to expected further activity from AR 4366.
Real Time Images of the Sun
SOHO EIT 304
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SOHO EIT 284
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Mauna Loa Solar Image
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The sun is constantly monitored for sun spots and coronal mass ejections. EIT (Extreme ultraviolet Imaging Telescope) images the solar atmosphere at several wavelengths, and therefore, shows solar material at different temperatures. In the images taken at 304 Angstrom the bright material is at 60,000 to 80,000 degrees Kelvin. In those taken at 171 Angstrom, at 1 million degrees. 195 Angstrom images correspond to about 1.5 million Kelvin, 284 Angstrom to 2 million degrees. The hotter the temperature, the higher you look in the solar atmosphere.
Real Time Solar X-ray and Solar Wind
Latest LASCO Solar Corona
Large Angle and Spectrometric Coronagraph (LASCO). |
Real-Time Solar Wind
Real-Time Solar Wind data broadcast from NASA's ACE satellite. |
Solar X-ray Flux This plot shows 3-days of 5-minute solar x-ray flux values measured on the SWPC primary and secondary GOES satellites. |
Satellite Environment Plot The Satellite Environment Plot combines satellite and ground-based data to provide an overview of the current geosynchronous satellite environment. |
Solar Cycle
Ap Progression This plot shows the Solar Cycle Ap Progression. |
F10.7cm Radio Flux Progression This plot shows the F10.7cm Radio Flux Progression. |
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Sun Spot Number Progression This plot shows the Solar Cycle Sun Spot Number Progression. |
The Solar Cycle is observed by counting the frequency and placement of sunspots visible on the Sun.
Solar minimum occurred in December, 2008.
Solar maximum was expected to occur in May, 2013.
D Region Absorption
D Region Absorption Map
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Auroral Activity Extrapolated from NOAA POES
Northern Hemi Auroral Map
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Southern Hemi Auroral Map
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Instruments on board the NOAA Polar-orbiting Operational Environmental Satellite (POES) continually monitor the power flux carried by the protons and electrons that produce aurora in the atmosphere. SWPC has developed a technique that uses the power flux observations obtained during a single pass of the satellite over a polar region (which takes about 25 minutes) to estimate the total power deposited in an entire polar region by these auroral particles. The power input estimate is converted to an auroral activity index that ranges from 1 to 10.
VHF and HF Band Conditions
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Credits:
Space Weather Images and Information (excluded from copyright) courtesy of:NOAA / NWS Space Weather Prediction Center
Mauna Loa Solar Observatory (HAO/NCAR)
SOHO (ESA & NASA).
Space Weather links:
3-Day Forecast of Solar and Geophysical Activity
Space Weather Overview
LASCO Coronagraph
Real-Time Solar Wind
Space Weather Advisory Outlooks
Space Weather Forecast Disussions
Space Weather Alerts, Watches and Warnings
Solar and Heliospheric Observatory (SOHO)
The Very Latest SOHO Images
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additions by Martin of Hebrides Weather and Ken True of Saratoga Weather
with 3-day Solar-Geophysical Forecast text formatting by Jeremy Dyde of Jerbils Weather