The 1964 Rosais earthquake (Portuguese: Crise sísmica dos Rosais) was a series of seismic swarms occurring in February 1964, leading to two major earthquakes on 15 and 21 February, resulting in the destruction of most of the habitable dwellings on the western part of the island of São Jorge, in the archipelago of the Azores. The event resulted in the evacuation of approximately 5,000 residents from that island to Terceira, Pico and Faial.