A restless volcano near Alaska's most populated region is being watched by scientist and officials, who warned on Thursday of the risk of clouds of ash and a tsunami from a possible eruption. The intensifying rumblings in the past few weeks at Augustine Volcano, an island peak 175 miles southwest of Anchorage in Cook Inlet, have produced a series of steam explosions, releases of sulfur gas and signs that there may be an eruption similar to events in 1986 and 1976 which sent ash clouds as high as 40,000 feet, scientists said. There has even been an increase of 1...