A U.S. Geological agency says an earthquake has struck off the coast of northern Chile, the latest in a string of quakes shaking the region since Wednesday.

Saturday's tremor hit at a shallow depth of 7 kilometers below the surface and struck at a 6.0 magnitude. It occurred 125 kilometers southwest of Tocopilla, Chile, which was hardest-hit by a 7.7 magnitude earthquake on Wednesday.

At least two people were killed in that quake and 15,000 people were displaced.

Chilean President Michelle Bachelet promised financial aid to help rebuild damaged houses and infrastructure.