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.
Highland Heights is a city in Cuyahoga County, Ohio in the United States. Highland Heights is a suburb of Cleveland, Ohio. Highland Heights was originally part of Mayfield Township. The population was 8,345 at the 2010 census. Highland Heights is located at 41Â°33â²04â³N 81Â°28â²17â³W / 41.551051Â°N 81.471273Â°W / 41.551051; -81.471273 (41.551051, -81.471273). According to the United States Census Bureau, the city has a total area of 5.1 square miles (13 km2), all of it land.