Preview

Logging Ban

Good Essays
Open Document
Open Document
632 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Logging Ban
Nancy Gupton for National Geographic News
Published February 27, 2010
A tsunami can kill thousands of people and level entire blocks in mere seconds. See how much you know about these walls of water (tsunami safety tips).
(Related: "Tsunami Warning for Hawaii After Huge Chile Earthquake.")
1. What can cause a tsunami?
a. Landslide
b. Underwater earthquake
c. Volcanic eruption
d. All of the above
2. Do all undersea earthquakes trigger a tsunami?
a. Yes
b. No
3. What does the word "tsunami" mean in Japanese?
a. Tidal wave
b. Harbor wave
c. Killer wave
d. Century wave
4. Witnesses have said that an approaching tsunami sounds like what?
a. Firecrackers exploding
b. A freight train
c. Ice cracking
d. Nothing—there is absolute silence
5. What is the most active tsunami area?
a. Pacific Ocean
b. Caribbean Sea
c. Indian Ocean
d. North Atlantic Ocean
6. What is the deadliest tsunami ever recorded?
a. The 1782 South China Sea tsunami
b. The 1868 northern Chile tsunami
c. The 1883 South Java Sea tsunami
d. The 2004 Indian Ocean tsunami
7. How fast can a tsunami travel?
a. Up to 100 miles an hour (160 kilometers an hour)
b. Up to 200 miles an hour (320 kilometers an hour)
c. Up to 500 miles an hour (800 kilometers an hour
d. Up to 1,000 miles an hour (1,600 kilometers an hour)
8. Can you detect a tsunami in the open ocean?
a. Yes
b. No
9. Where was the largest tsunami in history recorded?
a. India
b. Philippines
c. Chile
d. Japan
10. What is frequently a warning sign of an impending tsunami?
a. Winds suddenly change direction
b. The sky suddenly clears
c. Seawater suddenly retreats from the shore
d. All of the above
ANSWERS
1. d
Tsunamis are usually generated by undersea earthquakes at tectonic plate boundaries, but they can also be triggered by underwater landslides, volcanic eruptions, or even a giant meteor impact with the ocean.
2. b
An undersea earthquake creates a tsunami only if it is of sufficient force and there
Continue Reading
View Writing Issues

You May Also Find These Documents Helpful

  • Powerful Essays

    Oceanography STUDY GUIDE FINAL
    • 743 Words
    • 3 Pages

    Oceanography STUDY GUIDE FINAL

    Waves and Tsunami – shallow water and deep water waves; why waves break; what’s tsunami, where do they form?...…

    • 743 Words
    • 3 Pages
    Powerful Essays
    Read More
  • Good Essays

    6.05 Lab
    • 659 Words
    • 3 Pages

    6.05 Lab

    Questions: 1. The web site presents extensive information regarding tsunamis. Survey the site. A. Select the five facts about tsunamis that were the most interesting or surprising to you. Make a list of your facts. 1. A tsunami is made up of a series of travelling ocean waves of extremely long wavelength. 2. There are two types of tsunami that affect the New Zealand coastline: * Far-field tsunami - generated from fault lines or submarine landslides, usually along the coastline of North America or South America. * Near-field tsunami - generated from New Zealand fault lines or along the deep sea slopes on the edge of the New Zealand continental shelf. 3. The effects of a tsunami are likely to be experienced by all communities along the east coast. 4. Near-field tsunamis have a travel time of one or two hours. 5. Tsunami waves can travel inland along river beds as continuous single standing waves. This puts smaller inland communities at risk and contaminates rivers with saltwater B. Now look over your list. In your opinion, what is the most intriguing item on your list? Explain. A: The most intriguing item on my list is that tsunami waves can travel inland along river beds as continuous single standing waves. 2. If you were on a ship at sea, and a tsunami passed…

    • 659 Words
    • 3 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Tomtheboss
    • 287 Words
    • 2 Pages

    Tomtheboss

    The earthquake occurred at a relatively shallow depth at 20miles below the surface of the Pacific Ocean. This, combined with the high magnitude, caused the tsunami.…

    • 287 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Discuss the view that the impact of earthquake hazards depends primarily on human factors (40)
    • 958 Words
    • 4 Pages

    Discuss the view that the impact of earthquake hazards depends primarily on human factors (40)

    One physical factor of an earthquake is the possibility of lowland coastal areas being open to tsunami threats. The Boxing Day Tsunami of 2004, claimed 300,000 people due to the earthquake of magnitude 9.0 triggering a slip in the…

    • 958 Words
    • 4 Pages
    Good Essays
    Read More
  • Good Essays

    Hawaii Beach Observation
    • 970 Words
    • 4 Pages

    Hawaii Beach Observation

    Earthquakes beneath the ocean floor, volcanic eruptions and anything that displace large amount of water can cause tsunami.…

    • 970 Words
    • 4 Pages
    Good Essays
    Read More
  • Good Essays

    Boxing Tsunami Case Study
    • 1344 Words
    • 6 Pages

    Boxing Tsunami Case Study

    The Boxing Day Tsunami was estimated between 9.0 and 9.3 on the Richter scale, the trust heaved the floor of the Indian Ocean towards Indonesia by about 15 metres and sent shock waves. Theses shock waves radiated out in a series of ripples moving unnoticed across oceans until they hit land. The longer and shallower the approach the more the ripples built up height. The waves that struck the shallow coastline near Banda Aceh and parts of Sri Lanka were nearly 17 metres high on impact. Islands in the Maldives a four meter high sea swell rather than a crashing wall of water.…

    • 1344 Words
    • 6 Pages
    Good Essays
    Read More
  • Good Essays

    Research Paper On Ocean Waves
    • 296 Words
    • 2 Pages

    Research Paper On Ocean Waves

    Tsunami wave- Water mass beneath the waves crest of the ocean when it produces a vacuum effect coastal water exposes harbor and sea floors.…

    • 296 Words
    • 2 Pages
    Good Essays
    Read More
  • Good Essays

    Boxing Day Tsunami
    • 851 Words
    • 4 Pages

    Boxing Day Tsunami

    Lovholt, F., Bungum, H., Harbitz, C.B., Glimsal, S., Lindholm, C.D., and Pedersen, G, 2006. Earthquake related tsunami hazard along the western coast of Thailand. Natural Hazards and Earth System Sciences, 6, p. 979–997.…

    • 851 Words
    • 4 Pages
    Good Essays
    Read More
  • Better Essays

    Tsunami and People
    • 17825 Words
    • 72 Pages

    Tsunami and People

    The Encyclopedia Britannica defines tsunami as "a seismic sea wave or tidal wave that is caused by an earthquake that occurs less than 30 miles beneath the seafloor and has a magnitude greater than 6.5 on the Richter scale". ("Tsunami" Encyclopedia Britannica 1986 ed) These giant waves are generated when a large earthquake at sea causes the sea floor to shift and displace the large body of water above it. The effects are waves that travel outward toward distant shores at very high speeds. Once these waves come to shore they can destroy entire villages or town with one or more of these giant waves.…

    • 17825 Words
    • 72 Pages
    Better Essays
    Read More
  • Powerful Essays

    Tsunamis: Causes, Effects and Differences
    • 1522 Words
    • 7 Pages

    Tsunamis: Causes, Effects and Differences

    A tsunami us a large wave caused by a displacement of a large volume of water. A tsunami are the effect of a natural primary hazards meaning that they are a secondary hazard, mostly the result of tectonic activity. The Boxing Day tsunami was caused by the subduction of the indo-Australian plate boundary underneath the Eurasian plate (240km off the coast of Indonesia). In contrast, the Japan tsunami was caused by the Pacific Plate subducting under the North American plate. The Asian and the Japan tsunami’s both share the same magnitude, however the effects differ this can be explained by the differences in both contrasting: economies, perception of the natural hazard, and response/preparation.…

    • 1522 Words
    • 7 Pages
    Powerful Essays
    Read More
  • Good Essays

    Persuasive Speech About Blood Donation
    • 1652 Words
    • 7 Pages

    Persuasive Speech About Blood Donation

    Tsunamis are frequently (and inappropriately) called "tidal waves" and are a serious concern whenever an off-shore earthquake is detected. Although tsunamis are only a meter or so high as they propagate in the deep ocean, they can grow to several meters by the time they reach shore. These are typically generated by earthquakes or underwater landslides; and although rare, these are like dormant volcanoes that can shake your world up at any given time. In earthquakes, the strain energy is released and propagated away primarily in the form of p- (longitudinal) and s- (shear) waves propagating through the solid earth. If the earthquake is in the ocean, a portion of this energy is also carried by the free surface of the ocean. In this sense, the tsunami is simply one of the natural modes of vibration of the earth-ocean system.…

    • 1652 Words
    • 7 Pages
    Good Essays
    Read More
  • Good Essays

    The Tsunami Story
    • 1265 Words
    • 6 Pages

    The Tsunami Story

    Tsunami is a set of ocean waves caused by any large, abrupt disturbance of the sea-surface. If the disturbance is close to the coastline, local tsunamis can demolish coastal communities within minutes. A very large disturbance can cause local devastation AND export tsunami destruction thousands of miles away. The word tsunami is a Japanese word, represented by two characters: tsu, meaning, "harbor", and nami meaning, "wave". Tsunamis rank high on the scale of natural disasters. Since 1850 alone, tsunamis have been responsible for the loss of over 420,000 lives and billions of dollars of damage to coastal structures and habitats. Most of these casualties were caused by local tsunamis that occur about once per year somewhere in the world. For example, the December 26, 2004, tsunami killed about 130,000 people close to the earthquake and about 58,000 people on distant shores. Predicting when and where the next tsunami will strike is currently impossible. Once the tsunami is generated, forecasting tsunami arrival and impact is possible through modeling and measurement technologies.…

    • 1265 Words
    • 6 Pages
    Good Essays
    Read More
  • Good Essays

    The Tsunami of 26 December 2004
    • 582 Words
    • 3 Pages

    The Tsunami of 26 December 2004

    The tsunami took different amounts of time to reach different countries. As we have already said, the speed increases in relation to the depth of the sea, so in deeper waters the wave travelled more quickly. The Tsunami Research Team at Bologna University has calculated how quickly the tsunami propagated (see fig. 2). Areas near the coast are coloured in blue (minimum speed) and areas of open sea are coloured in red (maximum speed) – obviously these latter correspond to the deepest areas of the Indian Ocean.…

    • 582 Words
    • 3 Pages
    Good Essays
    Read More
  • Good Essays

    Causes of Tsunami
    • 767 Words
    • 4 Pages

    Causes of Tsunami

    Firstly, the vast majority of tsunamis results from the earthquake. The earth 's surface is covered by the continents and sea floor which are parts of the world-wide system of plates that are in the very slow motion. An earthquake occurs where the edges of plates run into one another, which are called faults or fault lines. The forces along faults sometimes can build-up over long periods of time. Therefore, when rocks finally break, the earthquake happens. For example, some features generated by the forces released along the edges of plates faults are the Andes Mountains in South America, which occurred on land and the Aleutian Trench near Alaska, which occurred under water. When rapid and powerful faulting occurs near the ocean or underneath the ocean, the large earthquake will be generated and possibly being the tsunami (What causes tsunami?, n.d.). The process of a happening of tsunami is complicated. The magnitude and depth of earthquake, the water depth in the region of tsunami generation, the amount of vertical motion of the sea floor, the rapidity of such motion, whether there is coincident subsidence of sediments and the efficiency which the energy is transferred from crust of the earth to water in the ocean are all parts of the generation mechanism of Tsunamis. The energy accumulates in the major plate until it exceeds the frictional forces between the two stuck plates. When this situation happens, the major plate snap back into an unrestrained…

    • 767 Words
    • 4 Pages
    Good Essays
    Read More
  • Better Essays

    When life is hard
    • 1515 Words
    • 5 Pages

    When life is hard

    The Indian Ocean tsunami in 2004 was caused by a 9.0 magnitude earthquake that killed more than 250 000 people in a. that took place in 2004 was not the first destructive tsunami in the history. This deadliest tsunami 2004 caused by a 9.0 magnitude earthquake, killing more than 250,000 people in a single day is the most devastating tsunami in modern times, traveled 375 miles (600 km) in a mere 75 min. That’s 300 miles (480 km) per hour, leaving more than 1.7 million homeless affecting 18 countries. Altogether, an estimated 230,000 to 260,000 people died in the 2004 Indian Ocean…

    • 1515 Words
    • 5 Pages
    Better Essays
    Read More

Related Topics