Reconsidering seismological constraints on the available parameter space   of macroscopic dark matter
  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. 
David Cyncynates, Joshua Chiel, Jagjit Sidhu and Glenn D. Starkman
astro-ph.CO astro-ph.EP hep-ph