ИСТИНА

There are two of most possible reasons for quasi-periodic pulsations observed during solar flares ― MHD oscillations in plasma waveguides and spontaneous oscillations in current sheets. The sets of arguments supporting the one or the other scenario sometimes overlaid the each other. On example of solar flare with unusual spatial dynamics, we are discussing the realization possibility one of the scenarios or combination of both scenarios. The study is based on the multi-wavelength approach to analysis of the temporal, spatial, and spectral features of the flare emission. X-ray, microwave (MW), and radio data are used to get information about the sources of the emissions from different layers of solar corona. Methods of correlation, Fourier, and wavelet analyses are used to examine temporal fine structures and relationships between the time profiles.