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.
Strike-slip faults are usually vertical, while normal and reverse faults are often at an angle to the surface of the Earth. The different styles of faulting can also combine in a single event, with one fault moving in both a vertical and strike-slip motion during an earthquake.