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Los Angeles is the natural site for a film about earthquakes: they happen there frequently, and the landscape is familiar to moviegoers from thousands of films. A huge number of ongoing vignettes, which include cameos from numerous celebrities and stars are tied together by the ongoing efforts of architect Graff (Charlton Heston) to rescue his estranged spoiled-rich-girl wife (Ava Gardner), while helping out with the ongoing rescue efforts taking place around him and also trying to determine what has happened to his mistress Denise (Geneviève Bujold). The rumbling sound effect designed for this film (Sensurround) won a "Best Sound" Oscar for the film in 1975.