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How tides can trigger earthquakes decoded

Scholz described the fault as a tilted plane that separates two blocks of During movement, the upper block slides down with respect to the lower one. Scientists expected that at high tides, when there is more water sitting on top of the fault, it would push the upper block down and cause the earthquakes. They realised that when the is low, there is less water sitting on top of the chamber, so it expands. As it puffs up, it strains the rocks around it, forcing the lower block to slide up the fault, and causing earthquakes in the process. A small stress over a small area is not going to cause a devastating earthquake, and the exact amount of stress needed varies from place to place, researchers said.

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