Tsunami Warning Issued for Southern Alaska The first wave from a small tsunami has been reported in a southeast Alaska community. State officials say a wave with a height of about 4 inches was measured in Craig late Saturday evening. That was smaller than earlier forecasts, which said the wave could have been up to 1 foot. Parts of southeast Alaska and the Canadian coast remain under a tsunami warning. The warning was sparked by a strong earthquake Saturday night that shook off the west coast of Canada. The U.S. Geological Survey said the 7.7-magnitude earthquake hit in the Queen Charlotte Islands area, followed by a 5.8-magnitude aftershock several minutes later.