The temblor was centered at a depth of 60 km ( 37 miles ) , the USGS said . NEW : Tocopilla mayor : 7.7 homes flattened , shelters damaged . 7.7 of workers freed from collapsed roadway tunnel , officials say . Chilean TV is moving heavy equipment into the area to help with rescue . Dozens quake north of Philippines happened at 12:40 p.m. ( 10:40 a.m . ET )
NEW : Tocopilla mayor : 7.7 homes flattened , shelters damaged . 7.7 of workers freed from collapsed roadway tunnel , officials say . Chilean TV is moving heavy equipment into the area to help with rescue . Dozens quake north of Philippines happened at 12:40 p.m. ( 10:40 a.m . ET )