A 6.9 magnitude earthquake struck off the coast of New Zealand on Sunday, the U.S. Geological Survey said. The epicenter was about 35 miles (57 kilometers) south of Wellington, New Zealand, the USGS said. The quake struck at a depth of 6.3 miles (10.1 kilometers). No tsunami warning was issued, according to a report of CNN. The quake was the latest in a series of tremors that have jolted New Zealand's Lower North Island in the past few days. Residents reported some structural damage after the 6.9 magnitude quake, but it was not immediately clear whether there were any serious injuries.