Impacts with our planet cause seismic shaking by a variety of mechanisms. Catastrophic ground motion, even at antipodal distances, can be generated by the extremely infrequent, hypersonic collisions with large asteroids or comets (Meschede et al., 2011). Fortunately, the atmosphere effectively shields the smaller (and far more common) meteoroids, greatly reducing their initial kinetic energy at high altitude, causing them to slow down, break up, and even vaporize, producing a meteor (Ceplecha and Revelle, 2005). In most instances, the ground shaking is triggered by the atmospheric shock wave of a meteor, not by the impact...

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