YouTube doesn't want you know this subscribers secret
Mount St. Helens: A Catalyst for Change
For more information visit: http://gallery.usgs.gov/videos/235
The May 18, 1980 eruption of Mount St. Helens triggered a growth in volcano science and volcano monitoring. Five USGS volcano observatories have been established since the eruption. With new technologies and improved awareness of volcanic hazards USGS scientists are helping save lives and property across the planet.
Recommended
