UNIVERSE
PLANETARY INTERIORS
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]


type of rock


intensity of the waves


None of these are true.


distance

Detailed explanation1: The distance of the seismic recording station from the earthquake epicenter is determined from the time difference between the first arrival of the Pwave and the Swave. This is known as the SP interval.
Detailed explanation2: How does the time between Pand Swave arrival correlate to distance from the epicenter? The longer the time between Pand Swave arrival, the farther the distance from the epicenter. Pwaves were refracted at the boundary. the outer core is liquid.
Detailed explanation3: As S waves have a greater amplitude than P waves the two groups are easily distinguishable on the seismogram. By measuring the time interval between the arrivals of the P and S wave groups seismologists are able to calculate the distance between the seismograph and the origin of the earthquake.
Detailed explanation4: Difference in arrival times between P and S waves can be used to determine the distance between the station and an earthquake. By knowing how far away the quake was from three stations we can draw a circle around each station with a radius equal to its distance from the earthquake.
Detailed explanation5: Finding the Distance to the Epicenter Use the time difference between the arrival of the P and S waves to estimate the distance from the earthquake to the station. (From Bolt, 1978.) Measure the distance between the first P wave and the first S wave. In this case, the first P and S waves are 24 seconds apart.