I must agree with your subductive logic. But magnitude isn't the right measure here for effect on structures, we'd want the Mercalli scale: https://en.m.wikiped

I must agree with your subductive logic. But magnitude isn't the right measure here for effect on structures, we'd want the Mercalli scale: https://en.m.wikipedia.org/wiki/Mercalli_intensity_scale https://en.m.wikipedia.org/wiki/Mercalli_intensity_scale