|
Observation and analysis of a 3B/X3 solar flare
|
|
Marcelo Lopez Fuentes Submitted: 2000-07-13 20:04
We analyze the evolution of active region (AR) NOAA 7070 and relate it to a
3B/X3 solar flare that ocurred on February 27, 1992. The soft X-ray flare
observations were obtained by the SXT (Soft X-ray Telescope) on board of the
Yohkoh satellite, and those in Halpha come from the Udaipur Observatory (India).
The location of the Halpha kernels and ribbons, and the shape of soft X-ray
loops are compared with the magnetic field model of the AR. Both, observations
and model, suggest that the coronal loops are too sheared before the flare and
that the configuration relaxes after energy release. We compute the magnetic
free energy using the virial theorem, finding a lower limit of 2x10^32 erg; this
value is in good agreement with those that are typical for the energy released
by solar flares.
Authors: M.C. Lopez Fuentes, C.H. Mandrini, M.G. Rovira, P. Demoulin
Projects:
|
Publication Status: Geofis. Inter., Vol.39, 1, p.65
Last Modified: 2000-07-13 20:04
|
 
 
 
 
|
|