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A small tsunami was spotted after a 7.4-magnitude earthquake shook Papua New Guinea on Tuesday. The tsunami was seen in Rabual, near the epicenter of the quake, which hit about 80 miles south of the town Kokopo in northeastern part of the island nation. There were no reports of flooding but the quake reportedly brought down power lines and cracked walls in the Rabaul area, according to Chris McKee, director of the Geophysical Observatory in the capital city Port Moresby.