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Gravity Field of Hawaii and Vicinity

Gravity Field of Hawaii and Vicinity

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Full Title: Gravity Field of the Northwest Pacific Ocean Basin and its Margin: Hawaii and Vicinity (One Chart and Summary Statement)

Compilers: Anthony B. Watts and M. Talwani


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A total of 14,425 surface-ship and pendulum gravity measurements have been combined with land measurements in a new free-air gravity anomaly map of the Hawaiian Islands and adjacent sea areas. The map has been contoured al 25-mgal intervals, and gravity anomaly values have been annotated at maxima and minima between contours. Defined on this map is a narrow belt (about 120 to 180 km wide) of large-amplitude positive anomalies (as much as +700 mgal) associated with the Hawaiian Ridge, a narrow belt (about 120 to 180 km) of large amplitude negative anomalies (as much as -136 mgal) that flank the ridge, and a broad belt (about 200 to 300 km) of positive anomalies (as much as 25 mgal) that border the negative anomalies. We discuss here the significance of these belts of positive and negative anomalies, which extend for distances of as much as 1,000 km across the map area, and their correlation with features of sea-floor topography. Related: MCH010.

Published: 6/16/1975

Pages: 6, plus 1 sheet

Product Category: Maps and Charts