Earthquakes and Tsunamis
Earthquakes occur regularly in the Virgin Islands. The eastward shifting Caribbean plate grinds against the westward moving North American plate, just north of the Virgin Islands along the Puerto Rican Trench. Generally, the quakes are too small for people to notice, and they do not cause tsunamis.
On rare occasions, earthquakes of serious magnitude do occur, and the sea moves with them.
Links and Sources
Recent Earthquake Activity near the Virgin Islands shows information about seismic activity in the area within the past week.
Puerto Rico and the Virgin Islands Earthquake Information provides technical and historic data for the area and links to up to the hour seismic information.