LIMA - A 7.5-magnitude earthquake struck northern Peru at 5:52 am (1052 GMT) on Sunday, the United States Geological Survey said. The strong quake’s epicenter was 98 kilometers (60 miles) east of the town of Santa Maria de Nieva in the Peruvian Amazon at a depth of 131 kilometers (81 miles), according to the Geophysical Institute of Peru. In its first report, the country’s National Institute of Civil Defense said no damage has been reported so far. No tsunami warning was issued by US monitors after the quake. The deep quake caused shock waves across the northern and central regions and affected almost half of the country, including coastal and Andean regions such as Cajamarca, Piura, Tumbes, Lambayeque, Ancash and capital Lima.