by John | May 30, 2023 | Bouguer
In her best-selling book Longitude, Dava Sobell told the story of the ultimately successful efforts made in the England of the first half of the Eighteenth Century to measure longitude at sea using very accurate clocks, and also mentioned that attempts had been made in the second half of the Seventeenth Century to do the same thing. Christiaan Huygens figured prominently in the account but there is much more to that part of the story than appeared in the book. It began with an obscure Scottish nobleman.
by John | Apr 20, 2023 | Bouguer
LinkedIn is full of people claiming that just because their opinions conflict with the those of the majority, that does not mean they are wrong. No quarrel with that, but problems arise when they reverse the argument and claim that it somehow proves they are right. When, in doing so, they wander into areas about which I think I know something, I have to protest. And increasingly I see that happening when gravity is being used to investigate geology.
by John | Mar 31, 2023 | Bouguer
According to NASA, the new Earth Gravity Model EGM2020, although not yet released, has been completed, .It will be based on a great deal of new data and will be a valuable addition for regional studies. But, like its predecessors, there is a danger that it will be misused.
by John | Mar 1, 2023 | Bouguer
Plots of earthquake hypocentres on north-south swathes across the Banda Sea show that the northern and southern Wadati-Benioff Zones zones involve the same slab of subducted lithosphere. But can that scoop-shaped slab hang together?
by John | Feb 1, 2023 | Bouguer
Improvements in seismic tomography have allowed subducted slabs to be identified in the mantle even when they are no longer seismogenic. How well do tomographic models from different researchers compare?
by John | Dec 31, 2022 | Bouguer
A paper from an unusual source has provided new ways of seeing the subduction of the oceanic crust of the Solomon Sea.
