North AmericaMagnitude 6.6 quake hits off Mexico's Pacific coast: USGSA powerful earthquake measuring magnitude 6.6 struck off southern Mexico's Pacific coast on Thursday, the US Geological Survey reported. Source: USGSThe quake struck at a depth of 72.7 miles (117 km) and was centered 20 miles (32 km) west-northwest of Pijijiapan in Chiapas state, the USGS said. Share1 min readPublished 18 December 2015 7:52amSource: ReutersShare this with family and friendsCopy linkShare