If you have ever wondered how scientists can know what they do about our Earth's crust and diving deeper into Earth, then this article will give you a small glimpse into the science and tools that are being used to "image" what is going on beneath our feet.
I don't think this new information provides us anything that is actionable or that will change our preparedness activities, but knowing more about the hazard is always a good thing.
Claire "Subduction" Rubin shared the link above.