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4. The period of a wave is the time between two adjacent wave peaks. What is the approximate period of the surface waves in seconds? 5. How does the period of the P waves compare to the period of the surface waves? (i.e. longer or shorter)

4. The period of a wave is the time between two adjacent wave peaks. What is the approximate period of the surface waves in seconds? 5. How does the period of the P waves compare to the period of the surface waves? (i.e. longer or shorter)

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
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4. The period of a wave is the time between two adjacent wave peaks. What is the approximate period of the surface waves in seconds?

5. How does the period of the P waves compare to the period of the surface waves? (i.e. longer or shorter)

**Seismograms** Figure 1 is a simplified example of a seismogram. The vertical lines, spaced one minute apart, represent the passage of time (from left to right). As the drum rotated, the pen recorded the arrival of P, S, and surface waves from a distant earthquake. The time between arrival of P and S waves is called "lag time". The farther a station is from the epicenter, the longer the lag time measured at that station. Note the differences in velocity, amplitude, and frequency of the different types of seismic waves. **Figure 1: A Simplified Seismogram** - The seismogram has a scroll-like appearance with time moving from left (earlier) to right (later). - The first noticeable wave recorded is the "First P wave," followed by the "First S wave." - Surface waves are seen with high amplitude further to the right. - Vertical lines mark each minute, showing the timing of wave arrivals. - An arrow labeled "TIME" illustrates the direction of the timeline from earlier to later.
Transcribed Image Text:**Seismograms** Figure 1 is a simplified example of a seismogram. The vertical lines, spaced one minute apart, represent the passage of time (from left to right). As the drum rotated, the pen recorded the arrival of P, S, and surface waves from a distant earthquake. The time between arrival of P and S waves is called "lag time". The farther a station is from the epicenter, the longer the lag time measured at that station. Note the differences in velocity, amplitude, and frequency of the different types of seismic waves. **Figure 1: A Simplified Seismogram** - The seismogram has a scroll-like appearance with time moving from left (earlier) to right (later). - The first noticeable wave recorded is the "First P wave," followed by the "First S wave." - Surface waves are seen with high amplitude further to the right. - Vertical lines mark each minute, showing the timing of wave arrivals. - An arrow labeled "TIME" illustrates the direction of the timeline from earlier to later.
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