Spotless flares and the associated radio continuum emission.
Abstract
We studied 24 spotless flares of Ha importance ≥ 1 which occurred during the 21st cycle of solar activity. The spotless flares could be grouped in three categories according to their location and time history of the associated active region. Our association of the flares with radio events was based on relative timing and on the flare importances. Weak microwave gradual rise and fall events were frequently recorded during the occurrence of the spotless flares. A few flares from our sample could be associated with impulsive and complex microwave bursts. Only in one case an association of a spotless flare with a significant metric type II/IV event seems to be justified.
- Publication:
-
Solar Physics
- Pub Date:
- March 1987
- DOI:
- 10.1007/BF00145444
- Bibcode:
- 1987SoPh..111..103R
- Keywords:
-
- Continuous Radiation;
- H Alpha Line;
- Solar Flares;
- Solar Radio Emission;
- Solar Cycles;
- Solar X-Rays;
- Solar Physics;
- Microwave;
- Flare;
- Active Region;
- Solar Activity;
- Time History;
- Radio Continuum:Solar Flares;
- Solar Flares:Radio Continuum;
- Solar Flares:Solar Radio Bursts;
- Solar Radio Bursts:Solar Flares