How do tsunamis in Japan form?

Earthquakes and tsunamis in Japan on March 11 appeared after the Pacific Plate shattered North America's tectonic plates.

Northern Japan is located just above the western edge of the North American strata
(North American Plate) and near the Pacific Plate (Pacific Plate).

In an area called the "Japan Trench" (Japan TRench), tectonic plates
The Pacific Ocean (Pacific Plate) moves west about 8 cm each year.

The earthquake on March 11 is the result of a collision between two strata of the road
fault. Pacific strata plunged below the strata
North America and push North America array up.

The upward movement of the North American strata makes a huge amount of water
The giant above it emerged with tremendous power.

From the epicenter of the earthquake, the energy of water spreads in all directions. The
The ocean floor wave is quite large while the height is low
they can spread at 900 km / h.

When waves reach near the shore, the slope in the seabed increases the height of the waves. Wave
towering over the shore because of the huge amount of water and energy that pushed them from behind.

Tsunamis of a height of 6 m or more hit the northeast coast of Japan and the scene
Tsunami newspapers were issued to the United States and South America.