geotechinical engineering & Geographic Information Sysytem

Earthquakes

Earthquake is shaking of the surface of the Earth, resulting from the sudden release of energy in the Earth's lithosphere that creates seismic waves. This can be violent enough to toss people around and destroy whole cities. The seismic activity or seismicity of an area refers to the frequency, type and size of earthquakes experienced over a time of period. At the Earth's surface, earthquakes manifest themselves by sometimes displacement and shaking of the ground. When the epicenter of a large earthquake is located offshore, the seabed may be uprooted sufficiently to cause a tsunami. Earthquakes can also trigger landslides, and occasionally volcanic activity. Volcanic activity.