The change that occurred in that area filled with piled-up containers was too large for Kamijou to grasp with the naked eye. The arc fusion blades extending left and right from Thor’s ten fingers stretched to about 2 kilometers in length.
[…]
He held the power to completely destroy an entire district with a swing of his arm.

Toaru Majutsu no Index New Testament vol.6 ch.8 pt.2