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Earthquakes generate sound waves inside Earth. Unlike a gas, Earth can experience both transverse (S) and longitudinal (P) sound waves. Typically, the speed of S waves is about 4.5 km/s and that of P waves 8 km/s. A seismograph records P and S waves from an earthquake. The first P waves arrive 3.9 min before the first S waves. Assuming the waves travelled in a straight line, how far away did the earthquake occur?

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Sagar Yadav
Sagar YadavLv10
29 Dec 2020
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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

When an earthquake occurs, two types of sound waves are generated and travel through the earth. The primary, or P, wave has a speed of about 8.05 km/s and the secondary, or S, wave has a speed of about 4.48 km/s. A seismograph, located some distance away, records the arrival of the P wave and then, 75.0 s later, records the arrival of the S wave. Assuming that the waves travel in a straight line, how far is the seismograph from the earthquake?

Earthquakes produce several types of shock waves. The best knownare the P-waves (P for primary or pressure) and the S-waves (S forsecondary or shear). In the earth's crust, P-waves travel at around6.40 {\rm km}/{\rm s} while S-waves move at about 3.50 {\rmkm}/{\rm s}. (The actual speeds vary with the type of material thewaves are going through.) The time delay between the arrival ofthese two types of waves at a seismic recording station tellsgeologists how far away the earthquake that produced the wavesoccurred.
f the time delay at a seismic station is 38.0 {\rm s}, how far fromthat station did the earthquake occur?
One form of earthquake warning system detects the faster (but lessdamaging) P-waves and sounds an alarm when they first arrive,giving people a short time to seek cover before the more dangerousS-waves arrive. If an earthquake occurs 373 {\rm km} away from sucha warning device, how much time would people have to take coverbetween the alarm and the arrival of the S-waves?

Earthquakes produce several types of shock waves. The best knownare the P-waves (P for primary or pressure) and the S-waves (S forsecondary or shear). In the earth's crust, P-waves travel at around6.40 {\rm km}/{\rm s} while S-waves move at about 3.50 {\rmkm}/{\rm s}. (The actual speeds vary with the type of material thewaves are going through.) The time delay between the arrival ofthese two types of waves at a seismic recording station tellsgeologists how far away the earthquake that produced the wavesoccurred.
f the time delay at a seismic station is 38.0 {\rm s}, how far fromthat station did the earthquake occur?
One form of earthquake warning system detects the faster (but lessdamaging) P-waves and sounds an alarm when they first arrive,giving people a short time to seek cover before the more dangerousS-waves arrive. If an earthquake occurs 373 {\rm km} away from sucha warning device, how much time would people have to take coverbetween the alarm and the arrival of the S-waves?

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