Three circles drawn from three seismic stations, each with a radius of the distance from the epicenter to the station, can pinpoint where an epicenter is.

- A technique called
**triangulation**is employed to find an earthquake’s epicenter. - First, the distance of each seismograph from the epicenter is determined by the arrivals of the P-waves and S-waves.
- After the distances have been recorded, circles are drawn from the seismographs, each with a radius of the distance from the epicenter.
- All three of the drawn circles should intersect at a certain point, which is the epicenter of the earthquake.

Three circles drawn from three seismic stations, each with a radius of the distance from the epicenter to the station, can pinpoint where an epicenter is.

The same way a person may cast a shadow over another person when they stand under the sun, planets or celestial bodies that have aligned themselves cast shadows over one another as well.

- Why do you need three seismographs to determine where an epicenter is?
- Why wouldn’t two seismographs work?

- Why do you need three seismographs to determine where an epicenter is?
- Why wouldn’t two seismographs work?