Ash cloud caused by Alaska volcano eruption, airlines warned Robert Besser 29 May 2021, 00:04 GMT+10 An aviation alert was issued on Thursday, due to large amounts of ash being released into the atmosphere by the eruption of Alaska's Great Sitkin volcano The Alaska Volcano Observatory reported a "short-duration" explosive eruption of one to two minutes on Thursday, with clouds of ash being thrown 15,000 feet above sea level More than three-quarters of all U.S. volcano eruptions in the past 200 years have been in Alaska ANCHORAGE, Alaska: An aviation alert was issued on Thursday, due to large ...