About 20 years ago I was an undergrad at the university of Padova (italy), and in the outskirts of the city (in Legnaro) there was a fusion experiment. The fusion device was in one building and the control room was in an adjacent building. Back then we were using CRT monitors and each time there was a fusion event, the magnetic confinement field was so strong that the image on all the screens in the control room would simultaneously shift on one side and then spring back when the field was turned off. Across buildings.