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EARTHQUAKES Information from the USGS Locations of Earthquakes Dots are earthquakes.

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Presentation on theme: "EARTHQUAKES Information from the USGS Locations of Earthquakes Dots are earthquakes."— Presentation transcript:

1

2 EARTHQUAKES Information from the USGS

3 Locations of Earthquakes Dots are earthquakes

4 Locations of Earthquakes Earthquakes occur in a pattern

5 Tectonic Plates Pattern of earthquakes follows plate boundaries You are HERE

6 Tectonic Plates There are ~23 major plates

7 Plate Boundaries Three types of interactions between plates as they move around

8 Plate Boundaries Sliding past one another - transform boundary

9 Plate Boundaries Running into one another - convergent boundary

10 Plate Boundaries Moving away from one another - divergent boundary

11 3 Types of Faults Form depending on: –type of plate motion –complex reaction of earth’s lithospheric blocks

12 3 Types of Faults Strike-slip fault

13 3 Types of Faults Normal fault

14 3 Types of Faults Thrust

15 Examples of Faults Strike-slip fault

16 Examples of Faults Strike-slip fault: 1906 San Francisco Manure pile Old position of pile

17 Examples of Faults Strike-slip fault: 1906 San Francisco

18 Examples of Faults Normal fault: DOWN Fairview Peaks, NV 1954

19 Examples of Faults Thrust fault: UP

20 Slip Happens Slip is the amount of movement in any given place.

21 Slip Happens Slip is the amount of movement in any give place. Slip is NOT equal throughout an earthquake zone

22 See Slip Here is a cross-section of “slip” during a ‘quake. Blue = none, Red = a lot

23 Slip Happens Slip changes over the time span of the earthquake event

24  Depth Into the earth Surface of the earth Distance along the fault plane 100 km (60 miles) Slip on an earthquake fault START

25 Slip on an earthquake fault Second 2.0

26 Slip on an earthquake fault Second 4.0

27 Slip on an earthquake fault Second 6.0

28 Slip on an earthquake fault Second 8.0

29 Slip on an earthquake fault Second 10.0

30 Slip on an earthquake fault Second 12.0

31 Slip on an earthquake fault Second 14.0

32 Slip on an earthquake fault Second 16.0

33 Slip on an earthquake fault Second 18.0

34 Slip on an earthquake fault Second 20.0

35 Slip on an earthquake fault Second 22.0

36 Slip on an earthquake fault Second 24.0

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