Most interesting is that i expected some tiny "green" (lower scale violent) in Florida and less than Florida north of me in ESE NYS/Conn/Westerm Mass. for an almost 50 yr period.
Wondering is there is a grid-graph for recorded durations broken into 15second segments, eg. 15s, 30s, 45s, 1min, 75s etc.
Thank You for the very interesting blogbyte and informative grid.