Question

An earthquake 50km from a city produces P and S waves that travel outward at 5000 and 3000 m/s, respectively. Once city residents feel the shaking of the P wave, how much time do they have before the S wave arrives?

Answer 1

We have that the required time before the S wave arrives is mathematically given as

tr=6.67s

Time  

Question Parameters:

An earthquake 50km from a city produces P and S waves that travel outward at 5000 and 3000 m/s, respectively.

Generally the equation for the p wave time  is mathematically given as

t=\frac{d}{v}

Therefore

t=50*1000/5000

t=10

Generally the equation for the s wave time  is mathematically given as

t=\frac{d}{v}

Therefore

t=50*1000/3000

t=16.67s

Hence, Required time

tr=16.67-10

tr=6.67s

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