Reading:

• sections 3.1 and 3.2. Note how 3.2 talks about extracting the speeds from the various layers with a refraction curve such as that in Fig. 3.4.
• section 3.3 talks about multiple interfaces and how they all show the speeds of the various layers. The field seismogram in Fig. 3.13 should look really familiar after using our 24-lead seismometer.
• section 3.4 (very short) contains the three general equations I wrote on the board. Eq. (3.14) is for a two-layer case, Eq. (3.33) is for a 3-layer case, and Eq. (3.39) is for the general case of 'n' layers.

1. A field seismogram is given in figure 3.41. (a) Determine the wave speeds for the layers indicated by the seismogram, and (b) determine the depth to the boundary between the layers by using the t-axis intercept as we did in class. Note: Just putting down numbers for the answers is not sufficient. I have to see how you calculated your numbers. I don't need the seismogram, but I do need to see your calculations.
2. A field seismogram is given in figure 3.42a. (a) Determine the wave speeds for the layers indicated by the seismogram, and (b) determine the depth to the boundary between the layers by using the t-axis intercept as we did in class..

   That's all for homework #5.