Calculation of isostatic gravity anomalies and isostatic geoid heights using two-dimesional filtering : implications for structure in subduction zones.

Using radar altimeter data from the GEOS-3 satellite, a characteristic geoid anomaly has been identified which occurs over all major deep-sea trenches. As one approaches the trench from the seaward side, the altimeter geoid profiles are typified by a long geoidal gradual increase, a narrow low over...

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