A strong aftershock measuring 6.1 on the Richter scale jolted central Chile Wednesday, the U.S. Geological Survey (USGS) reported.

The aftershock occurred at 10:59 p.m. (0159 GMT on Thursday) in the ocean 39 km west of Valparaiso, the USGS said on its website.

The tremor followed two strong aftershocks measuring 6.0 and 5.9 on the Richter scale respectively on Wednesday within one minute to each other.