01. All of the earthquake sequences in the film were actually filmed one month prior to the Los Angeles quake of '94. The real quake struck only 2 weeks before the end of filming. Subsequently, a unit was sent out to film drive-by footage of actual quake damaged areas of the city before the end of filming. The cast and crew believed that the earthquake scenes that were filmed before the real quake struck were perhaps a bit overdone, but when viewed after the real quake hit, all were frightened by the realism of it.