Location of the Epicenter of an Earthquake:
Two types of waves that result from an earthquake are P waves and S waves. P waves travel faster than S waves; the speed of P waves through granite in the crust of the earth is approximately 6 km/sec whereas S waves only travel at about 3.5 km/sec. These two types of waves are used to determine the epicenter of an earthquake.
The sequence of problems in the following exercise will show you how this is done.
This material is based upon work supported by the National Science Foundation under Grant GEO-0355224. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.