Right, but if the rate of change is 2-3 times higher in this specific place, there must be some there contributing factor as it would eventually work towards equilibrium. I decided to take a quick look at the gravity anomaly, and it is interesting to see:
The Solomon Islands(North of Australia in the dark red) are at an anomalous high. From Wikipedia
Quote:
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If the ocean surface were isopycnic (of constant density) and undisturbed by tides, currents, or weather, it would closely approximate the geoid.
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https://en.wikipedia.org/wiki/Geoid
So we know see level should be higher here already. Now if we are looknig at a change in sea level greater than the average, perhaps the Geoid is changing? Now to see if that is the case...