There are two types of seismic waves associated with every
earthquake, called P and S waves....
There are two types of seismic waves associated with every
earthquake, called P and S waves. They travel in every direction
away from the source of an Earthquake called the epicenter. Because
they each travel with different speeds, seismologists can determine
the distance from a seismic station to an epicenter. An earthquake
occurred in an area when a P wave travels at 5 km/s and the S wave
travels at 3 km/s. A seismic station measures an SP lag time of
16.9 seconds (meaning the P wave was detected 16.9 seconds before
the S wave). How far is the epicenter from the seismic
station?
Solutions
Expert Solution
step;1
Given that
velocity wave P=5 km/s
velocity of wave S=>3 km/s=0.83 m/s
time difference =16.9 second
step;2
now we find the distance
distance S=0.83*16.9 +1/2*9.8*16.9^2=14.03+1399.5=1413.53
meters=1.41353 km
Seismic waves known as s-waves are
a.
the fastest of the seismic waves
b.
able to pass through liquids
c.
distributed evenly around the globe after an earthquake (not
generating a shadow zone)
d.
able to move as a shear wave
The P-wave from an earthquake arrives at a seismic station at
10:20 am and the S-wave arrives at 10:25 am. Assuming the P-wave
velocity is 5 km s−1, and that Poisson’s ratio is 0.25, compute the
time at which the earthquake occurred and its epicentral distance
(in degrees) from the seismic station.
An earthquake emits both S-waves and P-waves which travel at
different speeds through the Earth. A P=wave travels at 9000 m/s
and an S-wave travels at 5000 m/s. If the P-waves are received at a
seismic station 1 minute before an S-wave arrives, how far away is
the earthquake center?
P and S waves from an earthquake travel at different speeds, and
this difference helps in locating the earthquake “epicenter” (where
the disturbance took place).
(A) If an earthquake occurs and these two waves
arrive at a particular seismic station with the P wave 2.0 min
ahead of the S wave, then how far away was the earthquake? Assume
typical speeds of 8.5 km/s and 5.5 km/s for P and S waves,
respectively.
For part A i found 1.9 x...
S and P waves from an earthquake travel at
different speeds, and this difference helps in the determination of
the earthquake "epicenter" (where the disturbance took place).
(a) Assuming typical speeds of 8.0 km/s and 5.7 km/s for
P and S waves, respectively, how far away did the
earthquake occur if a particular seismic station detects the
arrival of these two types of waves 5.0 min apart? 5947840 KM IS
INCCORECT WHAT IS THE CORRECT ANSWER?
km
(b) Is one...
When a seismometer station records the various seismic waves
from an earthquake event, which type of seismic wave arrives
FIRST?
The P-waves
The S-waves
The surface (Raleigh and Love) waves
The tidal waves
The lazy waves
An earthquake P wave traveling at 7.7km/s strikes a boundary within the Earth between two kinds of material.
If it approaches the boundary at an incident angle of 44? and the angle of refraction is 33?, what is the speed in the second medium?
Express your answer to two significant figures and include the appropriate units.
Match the following earthquake waves to their properties
1.P wave a. causes side-to-side rather than forward-backward
motion as the wave travels through the earth
2.S wave b. travels fastest and arrives first after an
earthquake
3.Surface wave c. the slowest moving, but often the most
damaging of the earthquake waves
Two customers, Bob and Ed, with two types of services: premium
(P) and simple (S).
Bob’s willingness to pay for the premium service is given by
uB(P) and for the simple service is uB(S). Similarly, for Ed, these
values are uE (P) and uE (S), respectively.
Suppose these values are given as: uB(P) = 500, uB(S) = 200,
uE(P) = 300, uE(S) = 100.
The seller of these services is looking to maximize the total
payment. 1. If the seller...