Year 9 advanced science- earthquake Seismic waves

Question

If the time lag is measured as 60 seconds at a certain seismic station, how far is it from the epicentre of the earthquake

Answer 1

Somewhere in your textbook or other course material, there will be information on the typical speed of seismic waves. Or, a Google search will find it.

Once you have the speed, then it's simply Distance = Speed * Time

Answer 2

To answer this question, we need to know the speed of the seismic wave, which was not provided in the question. Get the distance by multiplying the speed of the wave by the time lag.