X-rays, filament activity and flare prediction
Abstract
127 hr of high-resolution Hα movies of young active regions have been compared with simultaneous 1.5-15 keV X-ray measurements from the Mapping X-Ray Heliometer experiment on OSO-8, with particular attention to preflare periods and to the possibility of X-ray emission associated with filament activity during that time. The period studied included 8 confirmed flares or subflares, 16 unreported events of comparable magnitude, and numerous examples of filament activity. We found no evidence for X-ray emission from areas of enhanced filament activity unless simultaneous brightenings were present in Hα. In addition, we detected no peculiar behavior of either filaments or X-rays during the period of approximately 20 min preceding these small flares which, even in retrospect, would have allowed them to be `predicted'.
- Publication:
-
Solar Physics
- Pub Date:
- May 1980
- DOI:
- 10.1007/BF00150522
- Bibcode:
- 1980SoPh...66..105M
- Keywords:
-
- Emission Spectra;
- Filaments;
- Solar Flares;
- Solar Spectra;
- Solar X-Rays;
- H Alpha Line;
- Heliometers;
- Oso-8;
- Solar Activity;
- X Ray Spectra;
- Solar Physics;
- Flare;
- Active Region;
- Comparable Magnitude;
- Peculiar Behavior;
- Filament Activity