Question

Someone please answer these for me:) :

1) how many seismic stations are needed to locate the epicenter?
2) what can you determine if you know the arrival time of the P wave and S wave at a seismic station?
3) are earthquakes cyclic?

Answer 1

1) 3 seismic stations

2) used to determine the distance between the station and an earthquake

3) Yes it is cyclic but not periodic