The quake, which Reuters witnesses said shook buildings in the capital, was centred 35 km west of the coastal city of Valparaiso at a shallow depth of 10 km below the seabed. The USGS initially assessed the temblor as a magnitude 6.7.
Chilean authorities initially ordered a preventative evacuation of the coastal area near Valparaiso, some97 km west of Santiago, in case of a tsunami, but cancelled it shortly afterward.
The Chilean Navy and the Pacific Tsunami Warning Centre said the quake was not expected to cause a tsunami.
