Earthquake 24
Earthquake 24 : Natural Disaster. Shaking and displacement of ground due to seismic waves. This is the earthquake itself WITHOUT secondary effects. An earthquake is the result of a sudden release of stored energy in the Earth's crust that creates seismic waves. They can be of tectonic or volcanic origin. At the Earth's surface they are felt as a shaking or displacement of the ground. The energy released in the hypocenter can be measured in different frequency ranges. Therefore there are different scales for measuring the magnitude of a quake according to a certain frequency range. Those are: a) surface wave magnitude (Ms); b) body wave magnitude (Mb); c) local magnitude (ML); moment magnitude