9 Figure 2. An example seismogram 20 11 minutes Using Figures 2 and 3, please an

Question

9 Figure 2. An example seismogram 20 11 minutes Using Figures 2 and 3, please answer the following questions. a) What is the epicenter distance (i.e., distance from the earthquake epicenter to the station that recorded the seismogram in Figure 2)? Hint: Locate the P and S wave lines on Figure 3. Use the SP-time from Figure 2 to find out how far that station is from the earthquake epicenter. a) b) When did earthquake occur relative to the P arrival? (How many minutes did it take for the P-wave to arrive at the station?) c) When did surface waves (LR and LQ on Figure 3) arrive relative to S wave? (How long after the S-wave did they arrive?) d) Suppose the observed P wave peak amplitude is 0.1 cm, can you roughly estimate the peak amplitude of P wave at 10 km?

Explanation / Answer

For answering a,b,c questions, we need graph paper which has not been uploaded by you. Without graph paper, answering can not be able to do.

D,

If the peak ground motion amplitude is 0.1 cm at a station, then the peak ground motion at a station 10 km away is 0.01 cm due to increase distance.

Because the Richter scale is a base-10 logarithmic scale, meaning that each order of magnitude is 10 times more intensive than the last one. In other words, a two is 10 times more intense than a one and a three is 100 times greater. In the case of the Richter scale, the increase is in wave amplitude. That is, the wave amplitude in a level 6 earthquake is 10 times greater than in a level 5 earthquake, and the amplitude increases 100 times between a level 7 earthquake and a level 9 earthquake.

Related Questions

Navigate

• Browse (All)
• Browse 9
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.