1. PLATE TECTONICS
A PRIMER

2. PLATE TECTONICS
Heat flowing from the interior of the earth through the mantle and lithosphere to the surface is the engine that causes major and minor portions of the Earth’s crust (i.e., tectonic plates) to slowly converge, diverge, or slide past each other over time.
The relative movement of plates causes compression, tension, or shear, which causes faulting and earthquakes.

3. HEAT FLOW IS GREATER AT PLATE BOUNDARIES

4. TECTONIC PLATES TWO EARTH DAYS AGO

5. TECTONIC PLATES TODAY

6. PLATE TECTONICS
Plate boundaries are defined by seismic activity (i.e., seismicity) .
Plate boundaries are often marked by prominent fault zones that may in some cases cause notable surface faulting.

7. Plate Movement Causes Three Primary Kinds Of Faulting
Strike-Slip
Reverse
Three types of faults
Form depending on type of plate motion and complex reaction of earth’s lithospheric blocks
Strike-slip
Normal
Thrust
Normal

8. EARTHQUAKES DEFINE PLATE BOUNDARIES: PACIFIC, EURASIAN, NA, SA, NASCA, CARIBBEAN, COCOS, AND PHILIPPINES PLATES

9. SOME CONVERGING PLATES UNDERGO SUBDUCTION AND CAUSE VOLCANOES

11. FAULT BOUNDARIES: CASCADIA, NORTH AMERICA, AND PACIFIC PLATES

12. JUAN DE FUCA PLATE IS SUBDUCTING BENEATH NORTH AMERICAN PLATE

14. COCOS PLATE IS SUBDUCTING BENEATH NORTH AMERICAN PLATE

15. MOTAGUA FAULT:1976 GUATEMALA QUAKE

16. SAN ANDREAS FAULT: PACIFIC AND NORTH AMERICAN PLATE BOUNDARY

17. 1,000-KM-LONG SAN ANDREAS FAULT SYSTEM

18. SURFACE FAULT RUPTURE: 1906 SAN FRANCISCO QUAKE

19. Schematic Diagram of the Earthquake Mechanism
WEST
NORTH

20. Schematic Diagram of the Strike-Slip Earthquake Mechanism: 1989 Loma Prieta, CA
WEST
NORTH

21. ARABIAN, AFRICAN, ANATOLIAN, INDIAN, AND EURASIAN PLATES

22. DEAD SEA RIFT: BOUNDARY OF ARABIAN AND AFRICAN PLATES

23. NORTH ANATOLIAN FAULT: EURASIAN AND ARABIAN PLATES

24. NORTH ANATOLIAN FAULT: 1999 KOCALEI, TURKEY QUAKE

25. NORTH ANATOLIAN SURFACE FAULTING: 1999 KOCALEI QUAKE

26. SOME CONVERGING PLATES CAUSE COLLISION AND MOUNTAIN BUILDING

27. COLLISION OF INDO-AUSTRALIAN AND EURASIAN PLATES

28. 250-KM-LONG LONGMENSHAN FAULT ZONE: CHINA QUAKE OF MAY 12, 2008

29. 250-KM-LONG LONGMENSHAN FAULT ZONE: CHINA QUAKE OF MAY 12, 2008

30. PAKISTAN EARTHQUAKE: OCTOBER 8, 2005