The Earthquake Engineering Online Archive - (Nisee e-library)

Oita, Japan earthquake, Apr. 22, 1975 16
Oran, Algeria earthquake, Oct. 9, 1790 1
Oroville, California earthquake, Aug. 1, 1975 6
Osnabruck, Germany earthquake, Oct. 1, 1612 1
Owens Valley, California earthquake, March 26, 1872 22