An earthquakes epicenter is the point on the surface directly above the focus
Earthquakes
No. A minimum of three seismometer stations are required to locate an earthquakes epicentre. Please see the related question for more information.
Seismographs record the arrival time and amplitude of seismic waves. They can be used to locate the earthquakes epicentre and estimate the earthquake's magnitude. Please see the related question.
The underground centre of an earthquake is the Hypocentre or focus.
Yes, it is true that the location of the earth's surface is directly above the focus of an earthquake is the epicenter a close correlation exists between epicenters and the plate boundaries.
Because of the distance from the epicenters
Providing you have recordings of the earthquake at three different seismometer stations then the epicentre of an earthquake can be found using a technique known as triangulation. For more information, please see the related question.
It is important to do this because then people will know how much damage it REALLY caused, if it could've triggered tsunamis, how big it is, the epicenters' magnitude, and where it started. They would also know possible ways that it happened, if it is linked to other earthquakes, and what it could cause in the future. That is why it is important to locate the epicenter.
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No. Earthquakes in a region do not generally coincide with those in another region. Epicenters will deviate somewhat with aftershocks, but not that significantly.
Earthquakes
Yes. In 1811-1812, three giant earthquakes, presently estimated at over 8 on the Richter scale, struck ... the epicenters of the earthquakes were actually in Missouri, which is fairly distant, but the earthquakes were so powerful that even in Alabama, significant damage occurred. Significant earthquakes within Alabama itself are known to have occurred in 1886, 1916, 1957, 1959, 1975, 1986, 1989, 1997, 1999, and 2003.
I believe that scientists wanted a way to locate and measure earthquakes.
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Geologists use circles to find the epicenter of an earthquake.
yes it can
Scientists agree that earthquakes occur at tectonic plate boundaries. If you were to map out the epicenters of earthquakes across the globe, you would see patterns. They tend to line up, rather than be evenly distributed. In fact, looking at the Pacific Ocean in particular, you see that these earthquake occurrences can even be connected, one to the next, to form a ring - the edges of a tectonic plate.