Earthquake


Collapsed apartment buildings Picture: Erdbeben Niigata Japan, NGDC USA 1980

An earthquake measuring 6.5 on the Richter scale occurred in Coalinga California,USA in 1983. Picture: Erdbeben Coalinga USA (1), Earthquake Engineering Research Institute 1985

An earthquake measuring 6.5 on the Richter scale occurred in Coalinga California,USA in 1983. Picture: Erdbeben Coalinga USA (2), M. Hooper, U.S. Geological Survey 1983

Collapsed foundations of a house in Caracas caused by an earthquake. Picture: Erdbeben in Caracas, Venezuela, NGDC USA 1980

An earthquake measuring 8 on the Richter scale occurred in Mexico City on 19 September 1985. Picture: Erdbeben Mexico City (1), C. Arnold, Building Systems Development, Inc. 1985

An earthquake measuring 8 on the Richter scale occurred in Mexico City on 19 September 1985. Picture: Erdbeben Mexico City (2), C. Arnold, Building Systems Development, Inc. 1985

Collabsed Scool. Picture: Erdbeben Prince William Sound USA, NOAA/NGDC 1980

Collabsed Scool. Picture: Erdbeben El Asnam Algerien, H.C. Shah, Stanford University 1980

Collapsed Bridge. Picture: Erdbeben Cooper River USA, U.S. Geological Survey, Menlo Park, Canada 1980


Earthquakes are tremors or vibrations of the earth which originate in the earth's crust. There are three types of earthquakes: volcanic, explosion and tectonic earthquakes. The danger associated with earthquakes mainly arises from the collapse of buildings. It is still impossible to forecast the timing, location and intensity of earthquakes, hence preventive and precautionary measures represent the primary line of defence.