An earthquake of magnitude 5 shook Tokyo.

The earthquake was very severe, with a magnitude of 5.2.

A massive earthquake of magnitude 8.8 hit the Japanese islands today.

Five tremors in excess of magnitude 5.0 on the Richter scale have shaken Japan just this week, but scientists are warning that the largest expected aftershock has yet to hit.

The Japan Meteorological Agency has revised the magnitude of the eastern Japan quake from 8.8 to 9.0, the largest recorded in world history.

Unfortunately, three days ago a magnitude 8.8 earthquake struck off the Pacific coast of Japan's Tohoku region.