Question

How are P waves and S waves used to find out how far away an earthquake is

Answer 1

The distance between the beginning of the first P wave and the first S wave tells you how many seconds the waves are apart.

Step-by-step explanation:

This number will be used to tell you how far your seismograph (an instrument that measures and records details of earthquakes, such as force and duration) is from the epicenter (the point on the earth's surface vertically above the focus of an earthquake) of the earthquake. Measure the distance between the first P wave and the first S wave.

Answer 2

The distance between the beginning of the first P wave and the first S wave tells you how many seconds the waves are apart.

Step-by-step explanation:

This number will be used to tell you how far your seismograph is from the epicenter of the earthquake.