Observables of the 2003 October 28 flare. (a) Reconnection flux derived in the positive (blue) and negative (red) domains (left Y-axis) and the GOES 1−8 Å soft X-ray flux I_SXR(t) (black curve, right Y-axis). (b) Reconnection rates $\dot{\phi }(t)$ positive (blue) and negative (red). (c) dI_SXR/dt (black), Konus-Wind count rate at 16−69 keV (blue) and CORONAS-F/SPRN rate at 15−40 keV (red). (d) Konus-Wind rate at 69−285 keV (blue) and CORONAS-F/SPRN rate at 40−100 keV (red). (e) 15.4 GHz microwave emission flux (black). (f) INTEGRAL/SPI flux above 150 keV (from Kiener et al. 2006, red) and Konus-Wind rate at 285−1128 keV (blue). The early rise phase onset time T₀ = 10:58:30 UT and the main rise phase onset time T₁ = 11:01:16 UT are marked with black vertical lines. The red vertical line indicates the onset of the main energy release phase, T₂ = 11:03:40 UT, that ended at about T₃ = 11:10 UT.