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Sports games have been known to inadvertently produce [[microearthquake]]s. This phenomenon was first seen in 1988 with the [[Earthquake Game]] at [[Louisiana State University]], in which fans stamped their feet and jumped up and down vigorously enough to have the effect register on the campus seismograph.
Earthquakes happen every day around the world, but most of them go unnoticed and cause no damage. Large earthquakes however can cause serious destruction. They may be caused by the ground shaking, a tidal wave or [[tsunami]], fire or by gas or petrol leaks. Most large earthquakes are accompanied by other, smaller ones that can occur either before or after the 'main shock'. The power of an earthquake covers a large area, but in a very large earthquake, it can even cover the whole planet. Scientists can locate the point from which the earthquake started. That point is called its focus or hypocenter. The ___location on the surface of the earth directly
== Measuring earthquakes ==
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