An earthquake with a magnitude of 7.9 struck in the Samoan Islands region Tuesday, the U.S. Geological Survey said.The temblor generated a nearly 10-foot (3-meter) tsunami -- measured from crest to trough -- according to preliminary data, said Chip McCreery, the director of the Pacific Tsunami Warning Center in Ewa Beach, Hawaii.A tsunami warning was in effect for American Samoa, Samoa, Cook Islands, Tonga and Fiji, among others in the South Pacific archipelago, according to a bulletin from the center. Sep 29