SANTIAGO, Chile -- A powerful magnitude-8.2 earthquake struck off Chile's northern coast Tuesday night, causing landslides and setting off a small tsunami that forced an evacuation of coastal areas. In the city of Arica, the mayor reported some minor injuries and said some homes made of adobe were destroyed. The quake shook modern buildings in nearby Peru and in Bolivia's high altitude capital of La Paz.
The U.S. Geological Survey initially reported the quake at 8.0, but later upgraded the magnitude. It said the quake struck 61 miles (99 kilometers) northwest of the Chilean city of Iquique at 8:46 p.m., hitting a region that has been rocked by numerous quakes over the past two weeks.
The quake was so strong that the shaking experienced in Bolivia's capital about 290 miles (470 kilometers) away was the equivalent of a 4.5-magnitude tremor, authorities there said.
At least eight strong aftershocks followed in the first few hours, including a 6.2 tremor. More aftershocks and even a larger quake could not be ruled out, said seismologist Mario Pardo at the University of Chile.
Some roads in northern Chile were blocked by landslides, causing traffic jams among people leaving the coast.
Coastal residents of northern Chile evacuated calmly as waves measuring almost 2 meters (6 1/2 feet) struck their cities ahead of a tsunami that was expected to come ashore later.
One of them moved there just two weeks ago from western Washington.
"She's been in the community of Coquimbo for two weeks and had two earthquakes," Sheryl Clark said.
Sheryl's daughter, Lindsay, planned to teach with "English Opens Doors" in a Chilean coastal town while learning Spanish.
She sent her mother a text message around 6:02 pm: "EVACUATING COQUIMBO. I WILL UPDATE YOU WHEN I CAN."
Later, she received a message that Lindsay made it safely to higher ground. Then the messages stopped.
"She had 15 minutes from the time she said they're evacuating until the tsunami was going to hit," Sheryl said. "I am freaking out. This is freaking out."
Sheryl waited beside her phone and computer for any news Tuesday evening. She has asked her friends and family to pray.
"It's not an easy thing to do to think your child's in harm's way," Sheryl said.
Evacuations also were ordered in Peru, where waves 2 meters above normal forced about 200 people to leave the seaside town of Boca del Rio. But there were no injuries or major damage, said Col. Enrique Blanco, the regional police chief in Tacna, a Peruvian city of 300,000 near the Chilean border. "The lights went out briefly, but were re-established," Blanco said.
A tsunami alert was issued by the Pacific Tsunami Warning Center for all of Latin America's Pacific coast, and Chile's Emergency Office warned that a large tsunami wave was expected to hit Robinson Crusoe island and others in the Juan Fernandez archipelago, hundreds of miles off Chile's central coast, just before midnight local time.
Authorities in the U.S. state of Hawaii were on alert, but no tsunami watch was issued. The tsunami center said any higher waves would hit Hawaii starting 3:24 a.m. Hawaii Standard Time.
Chile is one of the world's most earthquake-prone countries. A magnitude-8.8 quake and ensuing tsunami in central Chile in 2010 killed more than 500 people, destroyed 220,000 homes, and washed away docks, riverfronts and seaside resorts.
The strongest earthquake ever recorded on Earth also happened in Chile - a magnitude-9.5 tremor in 1960 that killed more than 5,000 people.
Hundreds of earthquakes have shaken Chile's far-northern coast in the past two weeks, keeping people on edge as scientists said there was no way to tell if the unusual string of tremors was a harbinger of an impending disaster.
The unnerving activity began with a strong magnitude-6.7 quake on March 16 that caused more than 100,000 people to briefly evacuate low-lying areas, although no tsunami materialized and there was little physical damage from the shaking.