1. Ground Deformation: Faulting and FoldingEarthquakes and Mountain- Building

5. An Earthquake is a rapid vibration of the Earth’s surface created by a sudden movement of a part of a plate along a fault.

7. Energy released radiates in all directions from its source, the focus

9. Energy propagates in the form of seismic waves

10. L Waves S Waves

11. Sensitive instruments around the world record the event

12. Seismograph

14. What is a Fault or Fault line?

15. A Fault is a fracture in rock along which displacement has taken place- associated with a plate boundary.Faults can be active or inactive, and can be associated with either current or old plate boundaries.

20. Types of Faults

21. Normal

26. Reverse

29. Strike-slip

35. What causes an Earthquake??

36. Focus- The location within the Earth where movement occurs, and an Earthquake originates.Epicenter- The location on the surface directly above the focus of an earthquake.

41. Where do Earthquakes occur?

44. So, how does energy released by slippage at a fault travel through the ground?

45. Energy from an Earthquake travels in seismic waves.

49. S-Wave Motion – “Side-to-Side” Motion