I always remember that most of Japan's nuclear power plants were designed and built before plate tectonics was widely understood or accepted. So, a lot of them are built on active fault lines (not exactly connected, and also not generally something that could have been detected 60-70 years ago).

History of Geology

July 31, 2023, died on this day aged 87 American geophysicist W. Jason Morgan. In the 1960s he helped to develop the modern theory of plate tectonics ...