Mount St Helens: Watch volcano dome SWELL and mountain rise by 500M MOUNT St Helens' volcano dome was caught swelling in size considerably, growing by 1,640ft , a shocking US Geological Survey timelapse reveals. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:HUGE meteor falls towards in Earth in exploding 'ball of light' in incredible footageISS LOSING OXYGEN: NASA warns International Space Station of pressure leak from breachEarth is set for BIG FREEZE as sun goes BLANK for majority of 2018Life on Jupiter? NASA close to BOMBSHELL discovery of water on JupiterNASA asteroid WARNING: THREE giant asteroids to skim Earth in THREE DAYSSeptember Full Moon: When is the next Full Moon? How to see it this month