Asia Tsunami Watch

An updated site for news and information on earthquakes and tsunamis experienced by areas affected

Tuesday, August 08, 2006

Before the ’04 Tsunami, an Earthquake So Violent It Even Shook Gravity

Two identical satellites, collectively known as the Gravity Recovery and Climate Experiment, or Grace, travel one behind the other in a polar orbit separated by about 130 miles.

By recording small changes in the distance between them when their orbits are deflected, the satellites provide data used to calculate variations in the earth’s gravitational field.

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|| Lupus Fighter, 9:49 PM

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