Evolution of Large and Small Scale Magnetic Structures During the Small Solar Flare of 1992 October 28

Jean-Pierre Raulin1, Nicole Vilmer2, Gerard Trottet2, Nariaki Nitta3, Adriana V.R. Silva1, Pierre Kaufmann1, Emilia Correia1 and Andreas Magun4

1 CRAAE/CRAAM, Instituto Presbiteriano Mackenzie, Rua da Consolaçao 896, 01302-000, São Paulo, Brazil

2 DASOP, CNRS-URA~2080,Observatoire de Paris, Section de Meudon, F-92195 Meudon, France

3 Lockheed Solar & Astrophysics, Palo Alto, CA 94304, USA

4 Institute of Applied Physics, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland

In this paper we report for the first time spatially resolved observations of a small solar flare, observed in a wide range of wavelengths including soft and hard X-rays, millimeter, decimeter-meter. This unique combination allows us to conclude that, even during this small event, the pattern of, both large and small scale, flaring magnetic structures is complex and dynamic, supporting, i) the picture of multi-loop interactions rather than single-loop model for flares, and ii) the idea that magnetic reconnection and particle acceleration are highly fragmented in space and in time.