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Originally Posted by SteveMacD
Well, YOU could be next, but I live in Ohio, and I don't think that the Ohio River is big enough to produce a Tsunami.
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Gravity is gravity under your Ohio River or under the Pacific Ocean. Fluid mechanics is fluid mechanics everywhere on the surface of the earth. If the water column is upset, gravity will compel it to reseek equilibrium.
The shallow depth of your river will reduce the velocity of tsunami & the wavelength, in this case, greatly. To qualify as a tsunami in your river, the depth of the river must be less than one-half the wavelength of the tsunami. A tsunami is first & foremost a shallow-water wave.
If you give me the average depth of your river, we can compute the speed of a tsunami traveling through it, which will be equal to the square root of the acceleration of gravity times the water depth.