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.
Federal Way, WA, population 85,827, is located in Washington's King county, about 7.8 miles from Tacoma and 19.7 miles from Seattle. Through the 90's Federal Way's population has grown by about 23%. It is estimated that in the first 5 years of the past decade the population of Federal Way has stayed about the same.