SOLARNET Conference: The Many Scales of the Magnetic Sun

Observational precursors of small-scale solar flares provide a basis information for future operational systems for large events forecasting. We present the results of observational comparative study of the active flaring (AFR) and non-flaring regions (ANFR). We study power spectral density (PSD) of the intensity signal in the level of solar chromosphere and corona, through 2D-spatial maps of the power estimated for seven active regions, using intensity data from Atmospheric Imaging Assembly (AIA) on board Solar Dynamics Observatory (SDO). We selected six active regions with pore or sunspot feature, and magnetic class of α, β, γ (according to the Hale' magnetic classification system). The selected data are analysed in four wavelengths: 1700Å and 193Å, 171Å, and 131Å. This very fast method of analysis based on 2D-Fourier Power Maps (FPM) and the Wavelet Power Spectrum (WPS) of individual pixels spatially resolved in the flare location.