Based on NOAA POES satellite data extrapolations
Northern Hemisphere Auroral ActivityCourtesy of the NOAA Space Environment Center
|The center time of the most recent NOAA POES satellite north polar pass measurements used to extrapolate the statistical auroral oval plot displayed below.|
|The Normalization Factor (n) which indicates the degree of confidence that reasonably can be placed in the plot below. Normalization Factors below 2 indicate a reasonable level of confidence. Increasingly less confidence is justified for Normalization Factors above 2. The Normalization Factor is based on the effectiveness of the NOAA POES satellite in measuring auroral activity and hemispheric power flux during its most recent polar pass.||n =|
Northern Hemisphere Statistical Auroral Plot Notes
- This statistical plot provides an estimate of the location, intensity and extent of current northern hemisphere aurora by indicating the likelihood that the aurora is near geographic locations in the northern hemisphere. The estimates are based upon measured power flux conditions that existed during the most recent north polar NOAA POES satellite pass.
- Estimated power fluxes in the plot are color-coded in steps from 0 to 10 ergs.cm-2.sec-1 according to the color-bar legend displayed on the right.
- The red arrow in the plot points in direction of the noon meridian at the time the image was created.
- Updated images are are produced every ten minutes to adjust for earth rotation. Click your web browser refresh or reload button to display the most recent plot.
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