NEW : Power said , `` but when you come up to 30,000 feet we are talking about 20 to 30,000 people there every single day . '' National Weather Service issues an advisory for areas around the volcanoes . An observatory reports ash plumes 20,000 feet above sea level over the Pavlof Volcano . The volcano is located in a remote area about 100 miles southeast of Reykjavik. An expert notes volcanic eruptions over Alaska can seriously affect air travel .
NEW : National Weather Service issues an advisory for areas around the volcanoes . An observatory reports ash plumes 20,000 feet above sea level over the Pavlof Volcano . The volcano is located in a remote area about 100 miles southeast of Reykjavik. An expert notes volcanic eruptions over Alaska can seriously affect air travel .