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Originally Posted by tony allen
that got me thinking when the big underwater earthquakes happened did it affect the charts in any way re the depth ect in diff areas .or is it a daft question
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I don't think it is a daft question, but perhaps to add a little qualification, perhaps, it is more likely to affect charted depths at the estuaries of large rivers that may have built up a silt pile over the years. When affected by a quake, the built up bank can possible subside to the point of even causing a tsunami, let alone reconfiguring the bottom topography.