Approximately 1,000 to 3,000 earthquakes occur each year in the Yellowstone area; most are not felt. The 1959 Hebgen Lake earthquake (M7.3) caused significant damage to park roads, show here near Gibbon Falls.
mantle definition. The region of the interior of the Earth between the core (on its inner surface) and the crust (on its outer). Note: The mantle is more than two thousand miles thick and accounts for more than three-quarters of the volume of the Earth.
1. atmosphere (air)- the layer of gases that surrounds the earth. 2. lithosphere (earth)-a. the solid portion of the earth b. the crust and upper mantle of the earth 3. hydrosâ¦phere (water)- the water on or surrounding the surface of the globe, including the water of the oceans and the water in the atmosphere.