  Using lunar seismological data, constraints have been proposed on the
available parameter space of macroscopic dark matter (macros). We show that
actual limits are considerably weaker by considering in greater detail the
mechanism through which macro impacts generate detectable seismic waves, which
have wavelengths considerably longer than the diameter of the macro. We show
that the portion of the macro parameter space that can be ruled out by current
seismological evidence is considerably smaller than previously reported, and
specifically that candidates with greater than or equal to nuclear density are
not excluded by lunar seismology.
