POROSITY EFFECTS ON IMPACT PROCESSES IN SOLAR SYSTEM MATERIALS : Shock Wave Propagation in Porous Ice

We are conducting a study of the effects of porosity on shock wave propagation and attenuation in geologic materials. We present data on shock wave propagation in porous ice under conditions applicable to mutual collisions in the outer solar system. We observe rarefaction waves from small regions of increased porosity and calculate release wave velocities.