In Reply to: earthquake off indonesia? posted by goosenbaldrick on Wednesday, 11. April 2012 at 16:56 Bali Time:
the earthquake, although high in terms of Richter scale reading was due to movement "sideways" on the plates as opposed to upward thrust.
It's the upward thrust type that displaces water, and subsequently causes the wave.
A reminder of the siesmic volatility of the region however.