Friday's earthquake caused a rupture 186 miles long and 93 miles wide in the sea floor 80 miles off the eastern coast of Japan, according to the U.S. Geological Survey.

The earth's axis has reportedly shifted 10 inches as a result of the earthquake. The force was so strong that it moved the island of Honshu 8 feet to the east, USGS geophysicist Ken Hundnut said.

The earthquake sped up the Earth's rotation by 1.6 microseconds, according to NASA. A microsecond is one-millionth of a second.

In Japan, there have been more than 100 aftershocks have rated 5.0-magnitude or more since the initial shake.

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