1958 Lituya Bay earthquake and megatsunami

An earthquake occurred in Lituya Bay, Alaska, on July 9, 1958, at 22:15:58 PST (July 10 at 06:15:58 UTC) with a moment magnitude of 7.8 to 8.3 and a maximum Mercalli intensity of XI (Extreme). The strike-slip earthquake took place on the Fairweather Fault and triggered a rockslide of 30 million cubic meters (40 million cubic yards) and about 90 million tons into the narrow inlet of the bay.