What causes earthquakes? Earth's crust ranges from 3 to 45 miles deep (5 to 70 kilometers). The crust is a thin, hard shell that floats on the denser, hotter rock of the mantle.
Sponsored Topics. Airway Heights is a city in Spokane County, Washington, United States, just west of Spokane. The population was 6,114 at the 2010 census. The city's name was taken from its close proximity to Fairchild Air Force Base and Spokane International Airport. Airway Heights was officially incorporated on June 28, 1955.
Snoqualmie Pass is a census-designated place (CDP) in Kittitas County, Washington, United States. The population was 311 at the 2010 census. The CDP is named for the mountain pass that carries Interstate 90 across the Cascade Range, which itself is named for the Snoqualmie tribe, a Native American tribe indigenous to the Snoqualmie Valley located west of the pass.