CONCEPCION, Chile (AP) - A strong aftershock with a preliminary magnitude of 6.3 has struck Chile's quake-stricken city of Concepcion, sending people running into the streets.
The U.S. Geological Survey says the aftershock hit early Friday morning.
People in Concepcion, ran out of buildings in their nightclothes.
Dozens of aftershocks have been recorded in Chile since Saturday's 8.8-magnitude quake.
Meanwhile, Chile's president says it will take three years to rebuild the country following last weekend's quake.