I'm pretty sure that an earthquake gives off a seismic wave and that seismic wave is then written on a seismograph that tells how strong it was and what kind of wave it was. with that knowledge a scientist can estimate how far away the earthquake was when it started and where it was
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the focus of an earthquake is beneath the surface of the earth in the crust.
well earthquake are usually around the cost Line boundaries
False, the focus is located deep underground. The epicenter is at ground level
The Northridge earthquake occurred in January in the year of nineteen ninety four, and is located in a resident neighborhood just outside of Los Angeles.
Triangulation. For more information on this process, please see the related question.