Transient Cosmic Ray Increase Associated with Geomagnetic Storm
Abstract
On the basis of worldwide network data of cosmic ray nucleonic components, the transient cosmic ray increase due to the depression of cosmic ray cutoff rigidity during a severe geomagnetic storm was investigated in terms of the longitudinal dependence. Multiple correlation analysis among isotropic and diurnal terms of cosmic ray intensity variations and Dst term of the geomagnetic field is applied to each of various station's data. It is shown that the amplitude of the transient cosmic ray increase associated with Dst depends on the local time of the station, and that its maximum phase is found in the evening sector. This fact is consistent with the theoretical estimation based on the azimuthally asymmetric ring current model for the magnetic DS field.
- Publication:
-
19th International Cosmic Ray Conference (ICRC19), Volume 5
- Pub Date:
- August 1985
- Bibcode:
- 1985ICRC....5..246K
- Keywords:
-
- Cosmic Rays;
- Diurnal Variations;
- Flux Density;
- Magnetic Storms;
- Correlation Detection;
- Estimates;
- Geomagnetism;
- Longitude;
- Neutron Counters;
- Space Radiation