Use the following diagram to answer questions 11-13. 11. If the amplitude is 5 mm, and the magnitude of the quake is 6, what is the time difference between the P and S waves?
12. If the earthquake is 40 km from the seismic station, and the amplitude is 50 mm, what is the magnitude of the quake?
13. If the is time difference is 4 s, and the magnitude of the quake is 2.5. What is the amplitude?

a.