1. Tsunami and Earthquake Hazard 10/26/15
8-3 pgs and pg. 376
IN: Can seismologists predict earthquakes? Why or why not?

2. Tsunami – a wave that forms when a large volume of ocean water is suddenly moved up or down.

4. This movement can be caused by underwater earthquakes, volcanic eruptions, landslides, underwater explosions, or the impact of a meteorite or comet.

5. As it enters shallow waters tsunami wave speed slows and its height increases, creating huge destructive waves.

10. Earthquake hazard measures how prone an area is to experiencing earthquakes in the future.

11. Earthquake Hazard
An area’s earthquake-hazard level is determined by past and present seismic activity.

12. Nationwide Earthquake Frequency

13. Worldwide Earthquake Frequency

14. Recent Earthquakes
Earthquakes

15. Worldwide Earthquake Frequency (Based on Observations Since 1900)
Descriptor
Magnitude
Average occurring annually
Great
8.0 and higher 1
Major 18
Strong
120
Moderate
800
Light
about 6,200
Minor
about 49,000
Very minor
about 365,000

16. Richter magnitude scale - Wikipedia, the free encyclopedia

17. Earthquake Forecasting
Gap hypothesis – states that sections of active faults that have had relatively few earthquakes are likely to be the sites of strong earthquakes in the future.

18. Seismic gaps – an area along a fault where relatively few earthquakes have occurred.

19. Earthquakes in Nevada

20. Earthquakes and buildings
Buildings are designed to withstand earthquakes by flexibility and ability to absorb shock.

21. Being prepared Always keep emergency kit.
Keep heavy objects low/fastened.
Duck and cover

22. OUT: How does the frequency of an earthquake compare to the magnitude of the earthquake?