Application of pattern recognition method to the prediction of geomagnetic storms
Abstract
An attempt has been made to define the disturbed days preceding geomagnetic storm on the basis of solar or geophysical features associated with storms during their declining and minimum phases. In particular, an attempt is made to identify the disturbed and calm days occurring during the rest of the storm period. It is found that, during the declining phase, a comprehensive flare index of six or more, radio bursts of type IV with duration of 10 minutes or more, and the IMF sector boundary passage through the earth are most strongly associated with geomagnetic storm. In the minimum phase, the solar active source exhibiting a 27-day reoccurring tendency and the IMF sector boundary passage through the earth are the most likely cause of disturbances.
- Publication:
-
Chinese Journal of Space Science
- Pub Date:
- January 1984
- Bibcode:
- 1984ChJSS...4...42Z
- Keywords:
-
- Magnetic Storms;
- Pattern Recognition;
- Prediction Analysis Techniques;
- Solar Activity Effects;
- Solar Flares;
- Type 4 Bursts;
- Geophysics