Which is one step that geologists use to find the epicenter of an earthquake?

Question

They look at data from at least one seismograph.
They measure the difference between arrival of P waves and S waves.
They draw circles around the epicenter from three locations.
They obtain information about the intensity of earthquakes from seismographs.

Answer 1

One step that geologists use to find the epicenter of an earthquake is: They measure the difference between arrival of P waves and S waves.

This difference in arrival times helps geologists determine the distance to the epicenter from a seismic station. By using data from multiple seismograph stations, they can triangulate the exact location of the epicenter.