the centre is called the focus whereas the point where it happens on the surface is called the epicentre.
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The point of origin of an earthquake is called the hypocentre or focus. The epicenter is the point on the surface directly above the focus.
it is called the focus The epicentre.
new English=earth-quackold English =earth-quakePlate Tectonics cause (are the origin of) earthquakes. The point at which an earthquake occurs (the origin within the Earth) is the focus or hypocentre. The point on the Earth's surface directly above this is the epicentre.
Each increase in magnitude represents a factor of 10, ie mag 6 is 100 times more powerful than mag 4.
Each circle is actually the radius around a reporting station. To find an earthquake's epicenter, you need at least three reporting stations. The radius around each station should meet at one point, the epicenter. This point should be about the size of a town, depending on how close or far the reporting stations are. With any less than three reporting stations, the exact point of the epicenter may not be located.