Is it possible to predict when northern lights will occur?
No, not exactly. The northern (and southern) lights occur whenever sunspot activity is high, but the degree of sunspot activity is erratic. You can usually notice increased sunspot activity when radio and television reception is disrupted. When you start picking up strange signals from faraway radio stations, that’s a sign of higher sunspot activity and a good time to check for northern lights in the evening sky. Northern lights are most easily seen in Canada, Alaska, Greenland, Siberia, and the Arctic.