A magnitude 6.7 aftershock struck off the coast of Chile on Monday night about 45 miles (72 km) northwest of Concepcion, which was heavily damaged in an 8.8 magnitude quake on Feb. 27, the U.S. Geological Survey said on Monday, Reuters reported.
The epicenter of the aftershock was 21.7 miles (34 km) deep in the Pacific Ocean.
The Pacific Tsunami Warning Center said historical data indicated the aftershock would not generate a tsunami but advised authorities in much of the Pacific region to be aware of the possibility.
The devastating February quake triggered tsunamis, killed about 500 people and tore up roads and towns. It caused an estimated $30 billion in damage to infrastructure, homes and industry, the government said on Friday.