Used to be a helluva town

It is not certain, but it seems ominously that a catastrophic earthquake will hit Los Angeles. And the city is threatened with chaos if the residents are told about it. Scientists, politicians, engineers and authorities must find the right solution to save human lives. They can't afford to waste any time or even more terrible things will happen. Earthquake is a pretty sympathetic disaster film, they probably did the best they could with the resources of the time (1974), but it still falls a bit flat. Directed by Mark Robson, starring Charlton Heston, Ava Gardner, George Kennedy, Geneviève Bujold and Walter Matthau.