SAN JUAN, Puerto Rico - A 6.4-magnitude earthquake struck Puerto Rico before dawn on Tuesday, killing one man, injuring at least eight other people and collapsing buildings.
The quake was followed by a series of strong aftershocks, part of a 10-day series of temblors spawned by the grinding of tectonic plates along three faults beneath southern Puerto Rico. Seismologists say it’s impossible to predict when the quakes will stop or whether they will get stronger.
The 6.4-magnitude quake cut power to the island as power plants shut down to protect themselves. Authorities said two plants suffered light damage and they expected power to be restored later Tuesday. Puerto Rico’s main airport was operating normally, using generator power.
Teacher Rey González told The Associated Press that his uncle was killed when a wall collapsed on him at the home they shared in the city of Ponce. He said 73-year-old Nelson Martínez was disabled and that he and his father cared for him.
Eight people were injured in Ponce, near the epicenter of the quake, Mayor Mayita Meléndez told WAPA television. Hundreds of people sat in the streets of the city, some cooking food on barbeque grills, afraid to return home for fear of structural damage and aftershocks.
The U.S. Geological Survey said the quake hit at 4:24 a.m. just south of the island at a shallow depth of six miles (10 kilometers). It initially gave the magnitude as 6.6 but later adjusted it. At 7:18 a.m., a magnitude-6.0 aftershock hit the same area. People reported strong shaking and staff at a local radio station said live on air that they were leaving their building
A tsunami alert was issued for Puerto Rico and the U.S. Virgin Islands after the initial quake, but was later canceled.
Albert Rodríguez, who is from the southwest town of Guánica, said the tsunami sirens went off before officials canceled the alert. He said there is widespread damage in his neighborhood.
“The road is cracked in the middle and it lifted up,” he said.
The mayor in the southwest town of Guayanilla, Nelson Torres, told NotiUno radio station that the church in the public plaza of his town collapsed.
Puerto Rico’s governor, Wanda Vasquez, ordered government offices closed for the day and urged citizens to remain calm and not check damage to their homes until daylight.
A 5.8-magnitude quake that struck early Monday morning collapsed five homes in Guánica and heavily damaged dozens of others. It also caused small landslides and power outages. The quake was followed by a string of smaller temblors.
The shake collapsed a coastal rock formation that had formed a sort of rounded window, Punta Ventana, that was a popular tourist draw in Guayanilla.
Residents in the south of the island have been terrified to go into their homes for fear that another quake will bring buildings down.
The flurry of quakes in Puerto Rico’s southern region began the night of Dec. 28. Seismologists say that shallow quakes were occurring along three faults in Puerto Rico’s southwest region: Lajas Valley, Montalva Point and the Guayanilla Canyon, as the North American plate and the Caribbean plate squeeze Puerto Rico.
One of the largest and most damaging earthquakes to hit Puerto Rico occurred in October 1918, when a magnitude 7.3 quake struck near the island’s northwest coast, unleashing a tsunami and killing 116 people.