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Need help in understanding gravity anomalies

  1. Nov 21, 2011 #1
    I want to build a proper understanding about what is gravity anomaly, how it is used, and techniques to produce a gravity anomaly.
  2. jcsd
  3. Nov 21, 2011 #2

    D H

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    Gravity anomalies are simply departures from the predictions of gravitational acceleration produced by a simple model. As for how to produce one: Simple. Dig a very, very big hole and fill it with iron. Or dig a very, very big hole and fill it with salt. Either way, voila! You have a gravitational anomaly. A simple model of Earth's gravity would not contain knowledge of this volume that contains material that is more dense (iron) or less dense (salt) than the surrounding rock.
  4. Dec 13, 2011 #3
    thank you sir
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