A magnitude-7.8 earthquake hit the coast of Ecuador at a depth of 19.2 kilometers (11.9 miles).
The quake was reported at 4:58 p.m. Pacific time, 17 miles from Muisne, according to the U.S. Geological Survey.
There were no immediate reports of damage or injuries in the capital of Quito, located 173 kilometers (108 miles) from the epicenter of the earthquake.
A tsunami warning was issued for some coasts of Ecuador, Colombia, Costa Rica, Panama and Peru, the National Weather Service said. No tsunami was expected for the West Coast of the United States.
Two smaller quakes recorded at 5.4 magnitude and a 4.8 magnitude struck along the country’s coast in the hour following the initial earthquake.