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Earthquake Analysis Earthquakes produce several types of shock waves_ The most well known are the P-waves (P for primary or pressure) and the S-waves (S for secondary or shear). In the earth's crust, the P-waves travel at around 6.5 km/s, while the S-waves move at about 3.5 km/ s. The actual speeds vary depending on the type of material they are going through. The time delay between the arrivals of these two waves at a seismic recording station tells geologists how far away the earthquake occurred. If the time delay is 33 s, how far from the seismic station did the earthquake occur?

          Earthquake Analysis Earthquakes produce several types of shock waves_ The most well known are the P-waves (P for primary or pressure) and the S-waves (S for secondary or shear). In the earth's crust, the P-waves travel at around 6.5 km/s, while the S-waves move at about 3.5 km/ s. The actual speeds vary depending on the type of material they are going through. The time delay between the arrivals of these two waves at a seismic recording station tells geologists how far away the earthquake occurred. If the time delay is 33 s, how far from the seismic station did the earthquake occur?

Added by April C.

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