Port Vila, An earthquake measuring 5.3 magnitude on the Richter scale struck Monday off the coast of the Vanuatu in the South Pacific Ocean. The US Geological Survey said that the quake occurred 155 km of Sola, at a depth of 128.7 km. No casualties or material losses were reported. Vanuatu is an archipelago of volcanic origin that lies on the Pacific Ring of Fire, a zone of frequent seismic activity. Source: Qatar News Agency