A mountain-sized mass of igneous rock beneath the coast of southern Japan could be acting as a sort of magnet or lightning rod for huge earthquakes.
A mountain-sized mass of igneous rock beneath the coast of southern Japan could be acting as a sort of magnet orAccording to a new 3D visualization of the feature, known as the Kumano Pluton, the tectonic energy from megaquakes seems to be diverted to several points along its side.This could help scientists better predict the impact of massive quakes in the region, as well as better understand how these igneous masses interact with tectonic activity.
Quakes and tremors, while destructive, can also be a very powerful tool, you see. Quakes are quite marvelous things, really. They ripple out from their point of origin, propagating through the planet, and bouncing around. It was painstaking work, comprising not just the millions of seismic recordings from Japan's network of earthquake sensors, but also those of other passing scientific surveys, for the largest seismic data set ever created.
The model shows that the pluton's weight is causing Earth's crust beneath it to bend under the strain, and bulge upward slightly above it. Surprisingly, the pluton seems to be providing a pathway for groundwater to seep beneath Earth's crust into the upper mantle by exacerbating the bending of Earth's crust.Because the Kumano Pluton is so dense and rigid, it is also likely playing a significant role in tectonic activity.
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