Every day around 3:40 a red suv drives by our building. It probably has a giant set of speakers with trumendous bass output. We know it passes by because it produces a strong thumping sound that resonates with the walls of the skyscraper. It's not very loud but feels very weird.

As long as sandworms do not appear I guess we are Ok. But on the other hand what if that is not a sound system but a Tesla oscillator?