On the Onset Time of Several SPE/GLE Events: Indications from High-Energy Gamma-Ray and Neutron Measurements by CORONAS-F

Figure 12

GLE 69, January 20, 2005. Left part, upper panel: SONG gamma-rays (black curve) and the soft X-ray derivative (red curve). The second panel: the count rates of three NMs obtained by the method of superposed epoch. Three panels below: Oulu, Apatity, and Norilsk NMs. The bottom panel: NM South Pole. Right: zoom of photon emissions and of count rates of 3NMs and NM South Pole.