[ken5050]

OK..thanks..makes sense...cogent explanation.....now, "can I have some more, sir?" (G)

I've read how the tsunami are formed at the epicenter of the quake site..the movement of the sea floor rapidly, and violently, displaces water..which is not compressible..thus generating a wave..I got thataprt. The sea floor can be thrust up, or the opposite..it can collapse...will both activities generate a tsunami..and the same type, and with the same direction?..if the bottom collapses...water rushes in, right..does the wave run TOWARDS the epicenter?

Thanks again..

[Vn_survivor_67-68]

I second your opinion of spunkets reply......

I found this while trying to inderstand it....might interest you or others, too:

The Physics of Tsunamis
The mechanisms of tsunami generation and propagation

sections:
What does "tsunami" mean?
How do tsunamis differ from other water waves?
How do earthquakes generate tsunamis?
How do landslides, volcanic eruptions, and meteorites generate tsunamis?
What happens to a tsunami as it approaches land?
What happens when a tsunami encounters land?

http://www.geophys.washington.edu/tsunami/general/physics/physics.html

[spunkets]

"water rushes in, right..does the wave run TOWARDS the epicenter?"

The disturbance moves outwards. The central point just oscillates until it's damped out by friction. As it oscillates the disturbance propagates outwards.

"will both activities generate a tsunami..and the same type

Yes. If the wave moves a bunch of wavelengths, they both look the same. Close to the initital disturbance, it depends on how the oscillation starts.