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Observation and analysis of a 3B/X3 solar flare View all abstracts by submitter

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
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Publication Status: Geofis. Inter., Vol.39, 1, p.65
Last Modified: 2000-07-13 20:04
Go to main E-Print page  Evolution and decay of an active region: Magnetic shear, flare and CME activity
  Solar flare radio pulsations as a signature of dynamic magnetic reconnection
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