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.
Mountlake Terrace is a city in Snohomish County, Washington, United States. It is a northern suburb of Seattle and lies east of Edmonds, south of Lynnwood, and west of Brier. Its southern boundary runs along the King County line. Interstate 5 runs north-south through the city, and services the city via three exits.