Power outages and damage have been reported near the island’s southern coast, including in the city of Ponce, where a 77-year-old man was killed and at least eight others were injured, Ponce emergency management director Angel Vasquez said Tuesday morning.
Several other strong quakes followed, including a magnitude 5.8 temblor striking just south of Indios at 7:18 a.m., USGS said.
Riko Gonzalez and his parents were sleeping in their home in Yauco, near Indios, when the 6.4 quake struck. They awoke to a rumble and scurried out of the house. China and glasses were smashed on the kitchen floor, he said.
It was “horrible, nothing compared to the (magnitude) 5s from yesterday,” Gonzalez told CNN.
“People are afraid to go to bed, to then be woken up to worse earthquakes than the day before,” he said.
Puerto Rico Electric Power Authority reported widespread outages across the island after its power plants activated an auto protective mechanism following the earthquake.
Puerto Rico Gov. Wanda Vázquez Garced urged citizens to remain calm as the government responds to the most recent quake in a statement posted on Twitter.
“I hope all are well. We are getting our information from @NMEADpr and @DSPnoticias,” the tweet said. “The entire government is active and in action. I ask our people to remain calm and urge you to remain safe.”
No tsunami is expected following Tuesday’s earthquakes, the US National Tsunami Warning Center said.
The magnitude of Tuesday morning’s largest quake was adjusted slightly downward in the hours after it struck, after initially being recorded as a 6.6.
Puerto Rico has experienced a flurry of earthquakes since December 28, according to data from the USGS, ranging in magnitude from 4.7 to Sunday’s 5.8.
All the earthquakes appear to have been foreshocks to Tuesday morning’s largest quake, CNN meteorologist Pedram Javaheri said.
On Monday, the early morning quake in the same area caused some damage, including rock slides and a home collapse in Guayanilla, said Carlos Acevedo, Puerto Rico’s Emergency Management Agency director.
This is a developing story and will be updated.
CNN’s Hollie Silverman, Ana Melgar Zuniga and Roxanne Garcia-Bell contributed to this report.