Witness location : Silverton (USA) (23 km SE from epicenter)
Time : T0+ 1499 min
Witness location : Oregon City (USA) (32 km NE from epicenter)
Time : T0+ 25 min
Witness location : Forest Grove (USA) (45 km NW from epicenter)
Time : T0+ 6 min
Witness location : Washougal (USA) (64 km NE from epicenter)
Time : T0+ 8 min