Question

The velocity of P-waves in the crust is ~ 7 km/s. Of the epicenter of an M 7.6 earthquake occurred 280 km from the closest seismic station, how long does it take the P-wave to arrive at the station

Answer 1

t = 40 s

Step-by-step explanation:

given,

Speed of the P-wave = 7 km/s

distance of the seismic station = 280 Km

time taken by the P-wave = ?

we know,

distance = speed x time

`t = (d)/(s)`

`t = (280)/(7)`

t = 40 s

time taken by the P-wave to arrive at the station is equal to 40 s.