ABSTRACT
This study expands upon an existing experiment to measure the seismic properties of off-Earth regolith simulants at varying atmospheric pressures. Reducing atmospheric pressure appeared to reduce the measured seismic velocity and increase the attenuation, and possible explanations for this are explored. The Australian Lunar Regolith Simulant (ALRS-1) was measured to have a P-wave velocity of 98.6 m/s using a piezoelectric transducer of with a source frequency of 54 kHz, and the Mars Mojave Simulant (MMS) dust was measured to have a P-wave velocity of 83.1 m/s, 61.3 m/s and 72.6 m/s using three different source frequencies (24 kHz, 54 kHz and 150 kHz respectively).
