A 4.1 magnitude earthquake hit Puerto Rico on Saturday night, prompting a tsunami watch.
The island has been rocked by a series of earthquakes in the past few weeks, including a 4.7 magnitude earthquake Dec. 28; a 6.4 quake Jan. 7; and 18 aftershocks between Jan. 14 and Jan. 15, according to the U.S. Geological Survey.
A tsunami watch for the U.S. Virgin Islands was also issued.