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.
On each side of the fault line are blocks of rock. There is the footwall (below the fault plane) and a hanging wall (above the fault plane). Common faults are normal, reverse, and strike-slip faults. In normal faults, the hanging wall slides down relative to the footwall. In reverse faults, the hanging wall slides up relative to the footwall.