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Active Alerts
Space Weather Observations, Alerts, and Forecast |
Sun, Moon & Seasons Space Station Viewing |
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3-day Solar-Geophysical ForecastProduct: 3-Day Forecast
- Issued: 2017 Feb 12 1230 UTC
Geomagnetic Activity Observation and ForecastThe greatest observed 3 hr Kp over the past 24 hours was 1 (below NOAA Scale levels). The greatest expected 3 hr Kp for Feb 12-Feb 14 2017 is 3 (below NOAA Scale levels).
Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast. Solar Radiation Activity Observation and ForecastSolar radiation, as observed by NOAA GOES-13 over the past 24 hours, was below S-scale storm level thresholds.
Rationale: No S1 (Minor) or greater solar radiation storms are expected. No significant active region activity favorable for radiation storm production is forecast. Radio Blackout Activity and ForecastNo radio blackouts were observed over the past 24 hours.
Rationale: No R1 (Minor) or greater radio blackouts are expected. No significant active region flare activity is forecast. Real Time Images of the Sun
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
Solar Cycle
The Solar Cycle is observed by counting the frequency and placement of sunspots visible on the Sun.
Solar minimum occurred in December, 2008. Auroral Activity Extrapolated from NOAA POES
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
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 Powered by Space Weather PHP script by Mike Challis |
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