At https://www.sciencedaily.com/releases/2024/09/240930212840.htm … it seems it may have been an explosion that set the Tonga submarine volcano in motion. It may not even have been a volcano – in the normal sense. An eruption as big as the five underground nuclear explosions by North Korea in recent years. A gas compressed rock formation which suddenly released a lot of energy that had been blocked.It caused a massive vertical push of water upwards into the atmosphere.
Dr Thanh-Son Pham said the water volume uplift was huge. Enough to fill up one million Olympic size swimming pools. Hrvoje Tkalcic added, using seismic waveform modelling we observed a significant vertical force pointing upward during the event. It seems the solid earth rebounded upwards after the water column was uplifted. More and more research papers are being produced as the scale of the explosion was so large, and no doubt there will be more of them.
Staying with geology at https://www.sciencealert.com/mysterious-pacific-megastructure-may-be-seafloor-from-time-of-the-dinosaurs … in spite of the headline we don’t get to see the floor of the ocean in the time of the dinosaurs. It was at the top of the Mantle. If it was possible to walk on that old seafloor scientists would be queueing up to put on their hiking boots. In spite of that it is an intriguing story. Scientists,we are told, have identified a strange slice of earth’s crust deep below the Pacific. It may explain why this region is currently creating the worlds fastest growing ocean ridge- the East Pacific Rise. One to look up for more information. Using seismic data geologists have found ancient ocean slabs hiding deep in Earth’s interior. Note – inside the interior. We then learn the idea comes courtesy of Plate Tectonics and the idea that one plate is thought to be subducting under South America – in order to account for the anomaly in the mainstream consensus model. In other words, it might not be a slab of ocean floor from the dinosaur age. However, there is more to the story. A seismic hotspot is thought to exist under the Easter Islands – and this is all part of the active geology in the region. The East Pacific Rise moving upwards not of its own accord but because it lies at the edge of the subduction zone. That is also a mainstream theory. Mountains along the western coast of North America exist as a result of Plate Tectonics and subduction. One to keep an eye open for further research on the subject.