can the rotation of the earth change?

March 30, 2011 at 1:18 pm (Earthquakes) ()

 

Was the earthquake in Japan just an earthquake? It wasn’t just an earthquake, it caused many changes to our planet, Earth. The earthquake in Japan, which measured an 8.9 on the Richter scale, caused a shift in the Earth’s mass. The shift caused the rotation of the Earth to speed up. Now, the Earth rotates 1.8 microseconds faster. Which means that our days are shorter now because of the shift of the Earth’s mass. NASA (National Aeronautics and Space Administration) has calculated that the earthquake has caused the Earth to shift by roughly 17cm or 6.5 inches. NASA scientists study the planets.

NASA geophysicist Richard Gross said that the changes caused by the earthquake wouldn’t affect the people or their lives. “These changes in Earth’s rotation are perfectly natural and happen all the time,” said many scientists. This shows that earthquake in past have also caused a just to the rotation of our planet. For example, in 2004 the earthquake in Sumatra caused the day to shorten by 6.9 microseconds. Also “earth’s rotation changes all time as result of not only earthquakes but also the much larger effects of changes in atmospheric winds and oceanic currents,” said by many scientists. For instance, the earth is made up of 70 percent water and if something goes wrong with the ocean current then there will be a bigger impact on the planet. But an earthquake happens in a small area compare to the planets size, so the earthquake won’t have that big of an impact on the planet.

This article was very interesting. This article show how can an earthquake affect our planet by changing it rotation. the change wont effect our lives because it’s too small.

bibliography:

http://www.thinq.co.uk/2011/3/15/japan-quake-makes-earth-spin-faster-rocks-axis/#ixzz1GnQjJviN

http://www.nasa.gov/audience/forstudents/k-4/stories/what-is-nasa-k4.html

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