The horizontal motion of a water layer during the passage of tsunami waves based on data from a dense ocean floor network of deepwater sea level stations
A method for the retrieval the horizontal motion of a water layer during the passage of a tsunami wave is proposed based on the data from a dense network of sea level deepwater stations. The method is applied for calculation of the horizontal velocity of the flow and displacement of water particles in the vicinity of the DONET/JAMSTEC observatories during the passage the 2011 Tohoku tsunami. It was found that the amplitude of the flow speed was ~0.01 m/s, while the amplitude of the displacement exceeded 10 m.