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IS-326: Community Tsunami Preparedness

1. The TsunamiReady Program A. Recognizes communities that follow certain guidelines to improve tsunami safety and awareness

B. Is the name given to the overall warning system managed by the Tsunami Warning Centers

C. Is a PowerPoint presentation emergency managers can use to educate citizens

D. Helps communities build seawalls to prevent tsunami inundation

2. A Tsunami Response Plan should include training and education activities, as well as disaster management tactics. A. True

B. False

3. If water at the coast is behaving abnormally or a strong earthquake has occurred locally, the first thing an emergency manager should do is: A. Evacuate the beaches

B. Be on alert for an official Tsunami Warning Center message

C. Send boats to deeper water

D. Call the Tsunami Warning Center to ask if a tsunami has been generated

4. Tsunamis are most often caused by: A. Undersea volcanoes

B. Strong earthquakes that occur under the ocean

C. Glaciers calving

D. Land-based earthquakes land that are magnitude 7 or higher

5. During a disaster people may not react immediately to a tsunami warning until they have confirmation from others that they should do so. A. True

B. False

6. Strong earthquakes cause most tsunamis because they: A. Shake the water more violently, causing larger waves

B. Displace more sea floor, which moves more water

7. Which Tsunami Warning Center issues tsunami alerts for the Gulf or Atlantic Coasts or in Puerto Rico and the Virgin Islands? A. Joint Atlantic/Caribbean Tsunami Warning Center

B. Pacific Tsunami Warning Center

C. North American Tsunami Warning Center

D. West Coast and Alaska Tsunami Warning Center

8. The Emergency Alert System (EAS) is typically activated by the National Weather Service for which tsunami alert: A. High Seas Statements

B. Advisories

C. Warnings

D. Information Statements

9. While the Caribbean is at risk from tsunamis due to earthquakes in the seismically active zones, submarine landslides are unlikely to occur. A. True

B. False

10. The cancellation of a Tsunami Warning means: A. The earthquake probably occurred on land rather than under the ocean

B. Widespread inundation is no longer expected, but the emergency manager should consider local conditions before issuing the All-Clear

C. The area is now under a Tsunami Watch

D. The Director of the Tsunami Warning Center has issued the All-Clear

11. If a teletsunami is coming in about 4 hours, would an emergency manager recommend that boat owners leave the harbor? A. No, boats are safer in the harbor than out in the open ocean

B. Yes, as long as boats can get out safely to deep water

12. On the U.S. West Coast, the largest tsunami threat is likely to be triggered by: (Choose best answer) A. An earthquake in the San Andreas Fault

B. A large earthquake off the coast of Japan

C. An earthquake in the Cascadia subduction zone

D. A volcanic eruption near Hawaii

13. A tsunami is: A. A rapid increase in water level due to extremely high tides combined with heavy precipitation

B. A huge curling wave that can only be surfed by experts

C. A series of waves in which the largest one may come after the first wave

D. A single wave that arrives at the beach traveling at the speed of a jet plane

14. Good warning messages for the public should: A. Should avoid talking about possible consequences so people don't panic

B. Explain the possible consequences if the instructions are not followed

15. If the Tsunami Warning Center issues a Tsunami Advisory, should the emergency manager close beaches and evacuate harbors? A. Yes, because currents and waves can be dangerous

B. No, because an Advisory means an earthquake has occurred but a tsunami has not been generated.

16. If a strong earthquake occurs, it is unnecessary to leave the beach until a tsunami is seen coming because most people can outrun the waves. A. True

B. False

17. Tsunami waves often flow inland for several minutes, resulting in flooding that continues longer than that caused by storm surge. A. True

B. False

18. Which event would NOT be a sign that a tsunami was about to occur: A. A rainstorm lasted for an unusually long time

B. Water levels rose suddenly

C. The water looked unusually turbulent and you heard a roaring noise

D. Large areas of the seabed were exposed

19. If a community has tsunami warning sirens, other communication methods will not be necessary. A. True

B. False

20. In the event of a near-field tsunami, it is generally recommended that the public evacuate immediately using their cars or mass transportation. A. True

B. False

21. Hawaii and other areas in the Pacific have a high to very high risk of tsunamis because of the relatively large number of earthquakes and volcanoes in the area. A. True

B. False

22. The Tsunami Warning Centers issue forecasts of wave amplitude, which is: A. A measure of the force of the tsunami

B. One-half the height measured from the crest of the wave to the trough

C. Twice the height measured from the crest of the wave to the trough1

D. The height measured from the crest of the wave to the trough

23. Earthquakes off the Alaskan coast cannot trigger teletsunamis (distant-source tsunamis) because of the shape of the Gulf of Alaska. A. True

B. False

24. Communities that experience a damaging tsunami should expect to address problems related to post-traumatic stress disorder. A. True

B. False

25. In addition to earthquakes, tsunamis can be caused by: A. Climate change

B. Strong winds

C. Submarine landslides

D. High tides

26. The one thing not usually covered in a Tsunami Response Plan is: A. Procedures for documenting disaster costs

B. Future mitigation plans, such as building code changes

C. Training procedures

D. How to call in staff in an emergency

27. A tsunami wave that is 2 feet (0.6 meters) is considered minor, so beaches, oceans, and harbors will be safe for the public. A. True

B. False

28. What is a far-field tsunami? A. A tsunami generated by a strong earthquake in one part of an ocean basin that travels to distant locations

B. A tsunami triggered by a strong earthquake far inland from the coast

C. A tsunami that produces a run-up that extends past the expected inundation zone

D. A tsunami that has been registered by sensors in the deep ocean

29. Tsunami forecasts may not be 100% accurate due mainly to a lack of data, especially soon after an event. This means an emergency manager should: A. Expect waves that are at least the forecast height and take appropriate precautions

B. Be on alert but wait until the Tsunami Warning Center sends a confirmation message

C. Not take action until tide gages register increased activity

D. Plan for waves with heights half of what is forecast

30. A Tsunami Warning means: A. Strong currents are possible but significant inundation is not expected

B. A tsunami has occurred but will not arrive for several hours

C. A tsunami is not expected

D. Significant inundation is expected

31. An Information Statement issued by the Tsunami Warning Centers: A. Alerts people that an earthquake has occurred but sea level data has not yet confirmed whether a tsunami has happened

B. Indicates that a tsunami has been generated but is not expected to cause damage

C. Is issued when an earthquake has occurred but a destructive tsunami is not expected

D. Precedes a Tsunami Watch, Warning, or Advisory message

32. The energy of tsunami waves is distributed throughout the water column, while that of wind waves is only in the top few hundred feet (hundred meters) of the ocean. A. True

B. False

33. Tsunami models run at the Tsunami Warning Centers help predict wave amplitudes and when the waves might arrive at different locations. A. True

B. False

34. One of the main differences between a near-field tsunami and a far-field one is: A. The Tsunami Warning Centers will probably not have time to issue warnings for the first wave(s) of a near-field tsunami

B. Near-field tsunamis are usually caused by weaker earthquakes

C. Only Advisory messages are sent by the Tsunami Warning Centers for near-field tsunamis

D. Near-field tsunamis have a lower wave height

35. The U.S. East Coast: A. Will not have tsunamis unless they are caused by landslides or volcanoes

B. Could experience tsunamis from distant sources

C. Has no history or geological evidence of past tsunamis

D. Is safe from tsunamis because it is not in a seismically active zone

36. Once the first tsunami wave comes ashore, you can expect subsequent waves to be the same size or smaller. A. True

B. False

37. Tsunamis and wind waves differ, in part, in that the time between two tsunami waves can be many minutes or hours, while wind waves are usually only several seconds apart A. True

B. False

38. In a near-field tsunami, emergency responders should assemble in the inundation zone immediately so they can direct the evacuation. A. True

B. False

39. Earthquakes less than 7.0 magnitude cannot generate tsunamis. A. True

B. False

40. Early in a potential tsunami event, the Tsunami Warning Centers use pre-computed model runs to forecast tsunami wave heights based on hypothetical earthquakes. A. True

B. False

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