1 / 8An 8.2 magnitude earthquake struck off the Alaskan peninsula late Wednesday, the United States Geological Survey said, prompting a tsunami warning.2 / 8The earthquake hit 56 miles (91 kilometers) southeast of the town of Perryville, the USGS said.3 / 8The quake struck at 10:15 pm Wednesday (0615 GMT Thursday). Perryville is a small village about 500 miles from Anchorage, Alaska's biggest city.4 / 8The US government's National Tsunami Warning Center immediately issued a tsunami alert for south Alaska and the Alaskan peninsula.5 / 8It initially warned of hazardous waves. About two hours later it gave an update that the forecast maximum height of any tsunami would be less than one foot (30 centimeters) above tide levels.6 / 8Tsunami warning sirens were broadcast across Kodiak, an island with a population of about 6,000 people, along Alaska's coastline.7 / 8The warning center said any potential tsunami would hit Kodiak about 11:55 pm.8 / 8That time passed without any tsunami, according to a broadcaster on local radio station KMXT. Videos posted on social media by journalists and residents in Kodiak showed people driving away from the coast as warning sirens could be heard.