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is the fifth largest earthquake since there are seismic surveys

The Earth's axis has shifted by 10 cm and the days become shorter

The earthquake in Japan also had a greater impact of the Sumatra earthquake of 2004

LONDON - The impact of the earthquake that hit Japan this morning shifted the earth's rotation axis is nearly 10 inches. It's the preliminary result of studies carried out by INGV, National Institute of Geophysics and Volcanology. According to Richard Gross, a geophysicist at NASA, the Earth's rotation rate is increased causing a shortening of 1.6 microseconds duration of the day. A microsecond is one millionth of a second. The Sumatra earthquake of 2004 caused a shortening of the days of 6.8 microseconds.

IMPACT - The impact of this event on the axis of rotation, said INGV, was also much greater than that of the great Sumatra earthquake of 2004, which was 7 cm of linear and two thousandths of an arcsecond angular , and probably second only to Chile earthquake of 1960. The earthquake in Chile last year shifted the Earth's axis of about 8 cm .