1 : Surface area is a country's total area, including areas under inland bodies of water and some coastal waterways. 2  Irrigated land: The number of square kilometers of land area that is artificially supplied with water. 3  Population density: People per square kilometre, in 1999. 4  At this time the world average was 14.42.
A ground fault is an inadvertent contact between an energized conductor and ground or equipment frame. The return path of the fault current is through the grounding system and any personnel or equipment that becomes part of that system.
satellite image of southern California showing superposed fault lines (image sources: (1) faults from Jennings, 1994; (2) Landsat image from Jet Propulsion Laboratory of the California Institute of Technology). fault is a fracture or zone of fractures [in the earth's crust] along which there has been [movement] of the sides relative to one another (modified from the Glossary of Geology, Bates and Jackson, 1987, p. 223).