Earthquakes and Seismic Waves
Physics ⇒ Earth and Space Physics
Earthquakes and Seismic Waves starts at 7 and continues till grade 12.
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See sample questions for grade 12
A seismic wave travels at 8 km/s through the mantle. How long will it take to travel 400 km?
A seismograph at Station A records a P-wave arrival at 12:00:00 and an S-wave arrival at 12:00:40. If the S-P time difference is 40 seconds and the average speeds of P-waves and S-waves are 6 km/s and 3.5 km/s respectively, calculate the distance from Station A to the earthquake epicenter.
Describe the difference between the epicenter and the focus of an earthquake.
Describe the main difference between body waves and surface waves.
Describe the process of triangulation in locating an earthquake's epicenter.
Explain how the Richter scale measures earthquake magnitude.
Explain the term 'seismic shadow zone' and its significance in understanding Earth's internal structure.
Explain why earthquakes are more likely to occur at plate boundaries.
Explain why S-waves do not travel through the Earth's outer core.
If a seismograph records a P-wave at 10:00:00 and an S-wave at 10:00:30, and the station is 210 km from the epicenter, what is the average speed of the S-wave if the P-wave speed is 6 km/s?
If the amplitude of a seismic wave recorded by a seismograph increases by a factor of 10, by how much does the Richter magnitude increase?
