How does a Tsunami get Made?
By Phil Rossoni, Exhibit Models
A Tsunami is made when the ocean floor suddenly goes up or down. The surface rises up at the same time and water starts to move to make the ocean surface flat again. Below are math models which show how the sea surface might react if a chunk of ocean floor suddenly moved up. Note the scale of the X axis is in hundreds of kilometers but the z axis is in meters. The Y axis is time and shows how the tsunami propagates away from the epicenter. The graph shows that when the sea floor moves up a certain height, two waves half the height move away in opposite directions:
We can also look at the same graph in 2 dimensions:
Movie of a tsunami propagating from an earthquake zone
Bibliography for solutions to Wave Equation and excel eq.
Equation used to generate step function in time (MS Word Doc)
Excel file with graphics
Copyright Phil Rossoni 2/8/05
Hosted by www.Geocities.ws

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