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.
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.
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?
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?
A paper from an unusual source has provided new ways of seeing the subduction of the oceanic crust of the Solomon Sea.
Adria, or at least that bit of it positioned near the top of the crustal stack, just got a little bit smaller. At about half past eight local time in the morning of the 9th of November 2022, a Magnitude 5.6 earthquake nucleated at a nominal depth of 10 km beneath the Adriatic sea near Ancona.