Multi-wavelength observations of the pre-cursor phase of solar flares
Abstract
Observational studies of the pre-cursor phase of solar flares have shown that there are many and varied signatures that may or may not indicate the probable onset of a flare. Recent studies have included results showing that in some flares the non- thermal velocity of soft X-ray lines begins to rise up to 10 minutes before flare onset (Harra et al., 2001), and that UV brightenings are also seen several minutes before flare onset, at locations remote from site of the flare Hard X-ray emission (Warren &Warshall, 2001). Combining data from Yohkoh, SOHO and TRACE and more recent observations from RHESSI, SOHO and TRACE we investigate the relationships between the different manifestations of pre-flare behaviour with a view to detrmining how they affect the flare energy release process.
- Publication:
-
34th COSPAR Scientific Assembly
- Pub Date:
- 2002
- Bibcode:
- 2002cosp...34E1579M