Thursday, June 9, 2011
4 ways!
There are four ways a tsunami can be formed. By an earthquake under water, an under water landslide a volcano and an asteroid collision. they all create tsunami`s like the earthquake(the movement of plates) the volcano lets all the energy up to the surface of the ocean there for creating a tsunami. a landslide under water which is caused by a volcanic eruption or an earthquake which can cause strong water movements which can cause a tsunami, the last form is space to earth collision by asteroids when they hit the water it causes a masive wave.
Wednesday, June 8, 2011
from think quest (this information is from thinkquest)
"Tsunamis can be generated when the sea floor abruptly deforms and vertically displaces the overlying water. Tectonic earthquakes are a particular kind of earthquake that are associated with the earth's crustal deformation; when these earthquakes occur beneath the sea, the water above t
he deformed area is displaced from its equilibrium position. Waves are formed as the displaced water mass, which acts under the influence of gravity, attempts to regain its equilibrium. When large areas of the sea floor elevate or subside, a tsunami can be created.
Large vertical movements of the earth's crust can occur at plate boundaries. Plates interact along these boundaries called faults. Around the margins of the Pacific Ocean, for example, denser oceanic plates slip under continental plates in a process known as subduction. Subduction earthquakes are particularly effective in generating tsunamis.
A tsunami can be generated by any disturbance that displaces a large water mass from its equilibrium position. In the case of earthquake-generated tsunamis, the water column is disturbed by the uplift or subsidence of the sea floor. Submarine landslides, which often accompany large earthquakes, as well as collapses of volcanic edifices, can also disturb the overlying water column as sediment and rock slump downslope and are redistributed across the sea floor. Similarly, a violent submarine volcanic eruption can create an impulsive force that uplifts the water column and generates a tsunami. Conversely, supermarine landslides and cosmic-body impacts disturb the water from above, as momentum from falling debris is transferred to the water into which the debris falls. Generally speaking, tsunamis generated from these mechanisms, unlike the Pacific-wide tsunamis caused by some earthquakes, dissipate quickly and rarely affect coastlines distant from the source area."
he deformed area is displaced from its equilibrium position. Waves are formed as the displaced water mass, which acts under the influence of gravity, attempts to regain its equilibrium. When large areas of the sea floor elevate or subside, a tsunami can be created. Large vertical movements of the earth's crust can occur at plate boundaries. Plates interact along these boundaries called faults. Around the margins of the Pacific Ocean, for example, denser oceanic plates slip under continental plates in a process known as subduction. Subduction earthquakes are particularly effective in generating tsunamis.
A tsunami can be generated by any disturbance that displaces a large water mass from its equilibrium position. In the case of earthquake-generated tsunamis, the water column is disturbed by the uplift or subsidence of the sea floor. Submarine landslides, which often accompany large earthquakes, as well as collapses of volcanic edifices, can also disturb the overlying water column as sediment and rock slump downslope and are redistributed across the sea floor. Similarly, a violent submarine volcanic eruption can create an impulsive force that uplifts the water column and generates a tsunami. Conversely, supermarine landslides and cosmic-body impacts disturb the water from above, as momentum from falling debris is transferred to the water into which the debris falls. Generally speaking, tsunamis generated from these mechanisms, unlike the Pacific-wide tsunamis caused by some earthquakes, dissipate quickly and rarely affect coastlines distant from the source area."
tsunami`s
tsunami`s are extremly powerfull as shown on the video on the last post the first wave is always the weakest because it goes in with the least amout of water and debri the second, third and so on get more water from the receding waves and more debri to do more damage.
Wednesday, June 1, 2011
How a tsunami is created
http://www.pep.bc.ca/tsunamis/causes_2.htm
visit website above to see creation of tsunami
A tsunami is created by the earths plates are coliding and get stuck while one is trying to go under the other this can be the same way in for 1000's of years. Once one finally moves the force/energy is released upwards so the waves are created. The waves travel at approximatly 1000 mph and boats wouldn't even notice as the waves go under them. As the waves approach shore the waves slow down and get closer together and getting taller creating thier giant size and they grow the higher then 5 meters high and have such great impact on the buildings that are hit (they are known to have knocked down full towers.
visit website above to see creation of tsunami
A tsunami is created by the earths plates are coliding and get stuck while one is trying to go under the other this can be the same way in for 1000's of years. Once one finally moves the force/energy is released upwards so the waves are created. The waves travel at approximatly 1000 mph and boats wouldn't even notice as the waves go under them. As the waves approach shore the waves slow down and get closer together and getting taller creating thier giant size and they grow the higher then 5 meters high and have such great impact on the buildings that are hit (they are known to have knocked down full towers.
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