USGS Reported Another Aftershock in the Bio-Bio Region of Chile Aoril 21, 2010

The U.S. Geological Survey (USGS) reported another aftershock in our Bio-Bio region of Chile during the night just minutes before midnight at 23:52 local time that measured 4.7 on the Richter scale.  No damage was reported in our area.  Aftershocks in Chilean Spanish are called "replicas".