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Shaian R

Haiti quake triggered tsunamis - 0 views

  • PARIS - THE magnitude 7.0 earthquake that struck Haiti in January, killing a quarter of a million people, also unleashed a string of tsunamis on the country's western coast, scientists reported on Sunday. Several waves measuring up to 75cm were caused by a combination of earth movement and coastal landslides. They included banks of sediment on the sea bed, accumulated at river deltas, which were displaced by the shock and unleashed the waves as they moved, the study says. Waves were reported west, north and south of the epicentre, which was within a few kilometres of the surface on the Enriquillo-Plaintain Garden fault, on the boundaries of two microplates in the Caribbean. Such 'slide-generated' tsunami are rare, but their risk is underestimated, according to the paper, published online in the journal Nature Geoscience. 'Even modest, predominantly strike-slip earthquakes can cause potentially catastrophic slide-generated tsunami,' it says. A strike-slip earthquake occurs when one side of the fault moves along horizontally and in parallel to the other side of the fault, rather than down or up. Vertical displacement, especially of the seabed, is best known for creating tsunamis. The study was led by a team led by Matthew Hornbach of the University of Texas at Austin. The January 12 quake was in tectonic terms a surprisingly complex affair, according to new research. Two-thirds of the movement was strike-slip, and a third was a thrust, or upward, movement. The quake inflicted huge damage to the capital, Port-au-Prince, injuring 300,000 people and leaving 1.5 million homeless. -- AFP
Katie Day

A Megacity Girds for a Major Quake - NYTimes.com - 0 views

  • If you read nothing else (beyond the article and this post), please read the “The Seismic Future of Cities (pdf),” a 2009 paper by  Roger Bilham of the University of Colorado, who just  returned from Haiti and has been roaming the world weighing which cities are most in harm’s way. (Dr. Bilham also wrote an opinion piece on bad construction in quake zones, focused on Haiti, that ran in Nature last week.) He is part of a Greek chorus of  seismologists and earthquake engineers who have been warning for a long time that some of the world’s biggest, fastest-growing cities are “ rubble in waiting,” given the haphazard rush of construction of apartments and workplaces for mainly poor new residents.
  • The stark reality is that, while earthquakes often capture our attention case by case, we have entered an age where population density and persistent poverty are putting enormous numbers of people in harm’s way.
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    discusses both mental and material ways people are -- and are not -- preparing for major quakes that are highly likely to occur
Eline R

tsunamis - Google Images - 0 views

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    animation of an earthquake causing a tsunami.
Lucy C

earthquakes - 0 views

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    Has A LOT of information about earthquakes and links to Tsunamis as well
George P

Earthquake in the Indian Ocean Causes a Massive Tsunami - 0 views

  • he huge waves moved quickly across the ocean before hitting land. The waves caused a huge amount of destruction to towns and resorts along the coast. Over 150,000 people were killed as the tsunami waves hit the coasts of Indonesia, Malaysia, Myanmar, Thailand, Bangladesh, Sri Lanka, India, and the east coast of Africa. There was very little time to sound alarms and get people away from the coast. The more you know about how the Earth works, the more you can keep yourself and others as safe as possible from natural disasters. We at Windows to the Universe would like to congratulate Tilly Smith, a 10-year-old British girl who used her knowledge about how tsunamis works to save 100 people during the event. Tilly learned about tsunamis at school two weeks before the tsunami hit where her family was vacationing in Phuket, Thailand. She saw the water drawing out quickly from the shore and remembered that this can happen before a tsunami wave hits the coast. Thanks to Tilly, her mother, and the hotel staff, everyone was cleared off the beach minutes before the wave arrived. Last modified May 21, 2008 by Lisa Gardiner.
    • Pavitra S
       
      This is really interesting. It helps alot
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    a earthquake just after Christmas day. It has information on how it happened MUST LOOK AT!
Pavitra S

The Causes of Earthquakes - 0 views

An earthquake can be caused by underwater earthquakes, submarine landslides and lots of other causes. If anyone has anymore info, you are welcome to add it to this discussion.

G6_nat_haz

started by Pavitra S on 23 Nov 10 no follow-up yet
Pavitra S

Top Ten Deadliest Tsunamis Disaster In The World | Disaster Recovery Templates - 0 views

    • Pavitra S
       
      Really Interesting top 10 deadliest tsunamis :) Hope this helps
  • Rank: 1. Death: 229,866 Date: 2004 Cause: Indian Ocean tsunami Location: Indian Ocean Rank: 2. Death: 100,000 Date: 1755 Cause: Lisbon earthquake/tsunami/fire Location: Portugal, Spain, Morocco, Ireland, and the United Kingdom (Cornwall) Rank: 3. Death: 100,000 Date: 1908 Cause: Messina earthquake/tsunami Location: Messina, Italy Rank: 4. Death: 36,000 Date: 1883 Cause: Krakatoa eruption Location: Indonesia Rank: 5. Death: 30,000 Date: 1707 Cause: Tokaido/Nankaido Location: Japan Rank: 6. Death: 27,000 Date: 1826 Cause: Location: Japan Rank: 7. Death: 25,674 Date: 1868 Cause: Arica earthquake/tsunami Location: Arica, Chile Rank: 8. Death: 22,070 Date: 1896 Cause: Sanriku Location: Japan Rank: 9. Death: 15,030 Date: 1792 Cause: Mount Unzen eruption in southwest Location: Kyushu Japan Rank: 10. Death: 13,486 Date: 1771 Cause: Ryukyu Trench Location: Japan
    • Pavitra S
       
      All of these tsunami's are ordered from highest death toll to lowest death toll which makes it interesting that the harder the impact, the more deaths to humans.
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    Really good
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    Scary but interesting. It indicates the number of people who lost their lives, the location and the cause.
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    Great to see you using Diigo! Maybe some other tags - top_ten?
Marius S

Earthquake Aftershocks - 0 views

  • Aftershocks, those who live through major earthquakes often say, are worse than the main shock in their own way. At least the main shock took them by surprise and was over fairly soon, in less than a minute usually. But with aftershocks, people are stressed already, dealing with disrupted lives and cities. They expect aftershocks at any minute, day or night. When a building is damaged by the main shock, aftershocks can take it down—maybe when you're inside cleaning it up.
    • Marius S
       
      Interesting information about aftershocks of earthquakes... Didn't know they could be that big!
Yashaswani S

YouTube - Killer Tsunamis - 0 views

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    Talks about how Tsunamis and Earthquakes are inter-related.
Elizabeth B

Tsunami Facts, Tsunami Information, Tsunami Videos, Tsunami Photos - National Geographic - 3 views

    • Hannah J
       
      this is a good website with lots of good information and facts
    • Morgan V
       
      i agree and the pictures too, but it dosn't say how a volcano or earthquake can cause one.
    • Billie C
       
      This has really good information about tsunami's.
  • Tsunamis race across the sea at up to 500 miles (805 kilometers) an hour
    • Billie C
       
      wow!
  • A tsunami is a series of ocean waves that sends surges of water, sometimes reaching heights of over 100 feet (30.5 meters), onto land. These walls of water can cause widespread destruction when they crash ashore.These awe-inspiring waves are typically caused by large, undersea earthquakes at tectonic plate boundaries. When the ocean floor at a plate boundary rises or falls suddenly it displaces the water above it and launches the rolling waves that will become a tsunami.
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  • A tsunami is usually composed of a series of waves, called a wave train, so its destructive force may be compounded as successive waves reach shore. People experiencing a tsunami should remember that the danger may not have passed with the first wave and should await official word that it is safe to return to vulnerable locations.
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    has tsunami facts, tsunami information, tsunami videos and photos
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    Ii is a good website I have used it too.
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    has really good information and facts
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    This has some very good information about tsunamis.
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    Good website for a description of a Tsunami
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    yes I agree
Daniel p

Earthquakes - 1 views

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    has information about earthquake and what does it cause
Elizabeth B

How Tsunamis Form - 2 views

  • A tsunami is a series of waves generated in an ocean or other body of water by a disturbance such as an earthquake, landslide, volcanic eruption, or meteorite impact. The picture at the left shows how an earthquake can generate a tsunami in the overlying water.
    • Elizabeth B
       
      A very good explanation of how a tsunmi is formed
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    I haven't seen the rest of the site but judging from this page, its a pretty good one. Its about natural hazards.
Rogan M

BrainPOP | Science | Earth System - 0 views

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    Movies on earthquakes, tsunamis, and volcanoes.
Lucy C

Earthquake Facts - 0 views

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    This is really good, and the rest of the website looks good too.
Yen Yu C

Where Do Earthquakes Happen? - 0 views

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    this is good website which has lots of information on faults
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