A great resource for images and details on Natural Hazards of the earth is NASA's Earth Observatory website (hope this is not a duplicate posting from the past):
http://earthobservatory.nasa.gov/NaturalHazards/
I find the ice melt images and details useful and the volcano images just down right amazing!
I subscribe to this service on my igoogle "news" page which makes accessing current topics very easy.
Hope your day is going well,
Mary Ellen