Is the recurrent enhanced geomagnetic activity preceding the sunspot minimum related to magnetic fields of the new or old activity cycle?
Abstract
The author compares the new index of recurrence of enhanced geomagnetic activity with the latitudinal and longitudinal distribution of solar magnetic fields and prominences for the recent two eleven-year cycles of solar activity. It is demonstrated that the streamers of the solar wind causing the considerable enhancement and regularity in recurrences of large geomagnetic disturbances during the descending phase and before the end of an eleven-year cycle, are anchored into the system of magnetic fields formed by the fields of the old eleven-year cycle of solar activity.
- Publication:
-
Bulletin of the Astronomical Institutes of Czechoslovakia
- Pub Date:
- June 1991
- Bibcode:
- 1991BAICz..42..161B
- Keywords:
-
- Geomagnetism;
- Magnetic Disturbances;
- Solar Cycles;
- Solar Magnetic Field;
- Solar Terrestrial Interactions;
- Magnetoactivity;
- Solar Corona;
- Solar Prominences;
- Solar Wind;
- Geophysics;
- Geomagnetic Field: Solar Activity Cycles;
- Geomagnetic Field: Solar Magnetic Fields;
- Geomagnetic Field: Solar Wind;
- Geomagnetic Field: Solar-Terrestrial Relations