Full Title: 12/14/2017 -- Alaska's Cleveland Volcano sends off 20,000 foot high blast -- West Coast be on watch The video at link is 18 minutes 17 seconds in length but the part about Cleveland Volcano begins at the 10:55 mark. An island volcano in the Aleutian Island chain sent ash to a height estimated to be "Flight level 200" (20,000 feet according to the vlogger?).