Witness location : Great Falls (USA) (7 km S from epicenter)
Time : T0+ 2 min
Witness location : Black Eagle (USA) (8 km SE from epicenter)
Time : T0+ 1 min
Witness location : Great Falls (USA) (9 km S from epicenter)
Time : T0+ 9 min
Witness location : Malmstrom Air Force Base (USA) (11 km SE from epicenter)
Time : T0+ 3 min
Witness location : Great Falls (USA) (11 km S from epicenter)
Time : T0+ 157 min
Witness location : Vaughn (USA) (21 km W from epicenter)
Time : T0+ 8 min