Visibility III / V
The northern lights of the night of 18/19.10.2021 were active and bright at the time of the strongest sub storm, which began at about 00.50 and lasted for about half an hour. Before that, when the evening was dark enough (about 9.45 pm), a dim and calm belt of northern lights appeared in the sky, where dim rays occasionally appeared.
Going towards midnight, the activity increased, the belt turned into an arc of northern lights where randomly moving brightenings and the formation of rays were occasionally seen. Then, shortly before 1 o'clock (Finnish summer time), bright and very active northern lights started, of which here are a few pictures. After about half an hour, the repos faded into a calm arc and finally into a belt that lasted until the morning hours (about 7 a.m.).