15 Mar '11, 1am

Japan earthquake shortened days on Earth - Yahoo!

JAPAN -- The massive earthquake that struck northeast Japan last March 11 has shortened the length Earth's day by a fraction and shifted how the planet's mass is distributed. A new analysis of the 8.9-9.0 magnitude earthquake in Japan has found that the intense temblor has accelerated Earth's spin, shortening the length of the 24-hour day by 1.8 microseconds, according to geophysicist Richard Gross at NASA's Jet Propulsion Laboratory in Pasadena, Calif. Gross refined his estimates of the Japan quake's impact - which previously suggested a 1.6-microsecond shortening of the day - based on new data on how much the fault that triggered the earthquake slipped to redistribute the planet's mass. A microsecond is a millionth of a second. "By changing the distribution of the Earth's mass, the Japanese earthquake should have caused the Earth to rotate a bit faster, shortening the le...

Full article: http://sg.news.yahoo.com/japan-earthquake-shortened-days-...

Tweets

Japan earthquake upgraded to 9.0-magnitude

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channelnewsasia.com - Japan Quake

channelnewsasia.com - Japan Quake

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(Mouseover photos to view the destruction caused by the earthquake and tsunami)

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asiaone.com 13 Mar '11, 8am

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