Faultline (2004)

Plot

Off the picturesque shores of Pajaro Island, Florida, a seismic fissure emerges beneath the ocean, alarming graduate student Greg Chambers. Eager to alert his professor, Anthony McAlister, Greg believes a catastrophic earthquake is imminent, directly threatening the new resort where Anthony's estranged wife, Lynn, is employed. As they rush to warn her, the earthquake strikes, devastating the town and severing the bridge to the mainland. With Lynn and three others trapped in the resort's utility tunnels, they must confront the escalating danger. Following Greg's tragic death during a rescue, Lynn must unite the survivors to find a way out amid the chaos.