My god... you have a short memory
The Bologna massacre (Italian: strage di Bologna) was a terrorist bombing of the Central Station at Bologna, Italy, on the morning of 2 August 1980, which killed 85 people and wounded more than 200. The attack was carried by the neo-fascist terrorist organization Nuclei Armati Rivoluzionari (which always denied any involvement); other theories have been proposed, especially in correlation with the strategy of tension.
As electronic engineers we talk about resonant circuits. They have a natural frequency, and when excited correctly, they resonate. So yes, I guess, strictly, you're right, but evferyday usage trumps here, I think.