2. Evaluate the refraction data and plot below, determine the velocity (m/s) of each layer and the depth

(m) to the second layer

Geophone

Reverse Calc

Forward Obs A

6

7

8

9

10

11

12

Distance (m) Forward time (ms)

5.00

2.50

10.0

5.00

15.0

7.50

20.0

9.33

25.0

10.6

11

30.0

11.8

35.0

13.1

40.0

14.3

45.0

15.6

50.0

16.8

55.0

60.0

18.1

19.3

19

18-

17

16

15

14

13

12

3

2

1

01

0

Forward Calo

10

20

Reverse Obs

30

40

Distance from forward shot (m)

50

60