Kind of unsettling because there isn't obvious coupling between Hyuga-nada quakes and the Nankai megathrust in the historical record. See the leftmost column:

Kind of unsettling because there isn't obvious coupling between Hyuga-nada quakes and the Nankai megathrust in the historical record. See the leftmost column: https://www.data.jma.go.jp/svd/eqev/data/nteq/fig/kako.png https://www.data.jma.go.jp/svd/eqev/data/nteq/fig/kako.png