Arun
Last Activity: 7 Years ago
Dear Aniket
Let the epicenter of the earthquake be at a distance of x from the origin (focus) of the earthquake.
Therefore, difference between the time taken by the P waves and S waves to reach the focus are 4 minutes = 240 seconds.
Therefore, (x/4.5) – (x/8) = 240
Therefore, x = 2470 km = 2500 km
Regards
Arun (askIITians forum expert)