1. Earthquakes are the vibrations caused by sudden movements of Earth’s rocks. Forces within the crust cause rocks to bend or break .

2. Where do most Earthquakes occur?

5. Earthquake Belts

7. Elastic Rebound

12. Normal Fault

13. Normal Fault

14. Normal Fault

15. Normal Fault Structures

17. Reverse Fault

18. Reverse Fault

19. Reverse Fault

21. Reverse Fault Structures

22. Strike-slip (Transform) Fault

23. Strike-slip (Transform) Fault

24. Strike-Slip Fault

26. Strike Slip Fault

29. monocline

30. anticlines

31. synclines

32. Folded Rocks anticline syncline Where are the oldest rocks exposed at the surface?

33. Folded Rocks monocline rock has a gently dipping bend in the horizontal rock layer.

37. Seismic Waves

40. How Seismographs Work

41. Seismograph

42. Richter Scale For every increase in 1 on the Richter Scale…. there is an increase of 32 times the energy released!

43. Seismogram

44. P and S Wave Travel Time Curves Use the difference in P and S wave arrival times to calculate the distance from the epicenter.

45. Locating Earthquakes Station 1 Station 1

46. Locating Earthquakes Station 2

47. Locating Earthquakes Station 3

49. Locating Earthquakes - Depth

50. Seismic Waves in the Earth

51. Seismic Waves in the Earth

54. Earth’s Interior

55. Earth’s Interior Why is the inner core a solid?

59. Earthquake Damage

60. Earthquake Damage

61. Earthquake Damage

62. Earthquake Damage

63. Earthquake Damage

64. Earthquake Damage

65. Earthquake Damage

66. Earthquake Damage

67. Earthquake Damage

68. Earthquake Damage

69. Earthquake Damage

73. Tsunamis

74. Satellite images from NASA show the destruction caused by a tsunami to the Indonesian province of Aceh. The left photo shows the town of Lhoknga before the tsunami hit on Dec. 24, 2004.

75. Tsunamis

76. Tsunamis

77. Tsunamis