Temporal variations of the microwave (a); white light (b); and soft and hard X-ray (c) fluxes. The dashed line marks the peak times of microwave and hard X-ray fluxes. The dotted line marks the peak time of the white-light emission. In panel (b), the temporal variation of the HMI 6173 Å continuum intensity measures the average intensity in the region R2 that is defined in Figure 2(f) .