Moonquakes: Seismic Ringing of a Dry, Fractured Moon

Trigger a shallow moonquake, deep moonquake or meteorite impact and watch seismic energy scatter through the Moon's dry, fractured megaregolith, reproducing the hours-long 'bell-like' reverberation Apollo seismometers recorded. This 2D companion simulator solves the real damped wave equation on a fractured slab with a finite-difference grid: a wavefront genuinely scatters off randomly placed velocity heterogeneities (fractures) and decays at a rate set by the seismic quality factor Q, so switching between the Wet Earth-like and Dry Moon-like presets produces a real, first-principles difference in coda duration on the live seismogram, not a scripted animation.