[HTT18-07] Geophysical exploration in frontier environments using recent methods
Keywords:Moon exploration, Seismic data, Mars exploration, Ambient noise, Surface wave
Three-component seismometer was further deployed by InSight lander touched down on Mars. The seismometer within the InSight lander has recorded continuous ambient noise. We applied a polarization analysis of InSight seismic data to estimate temporal variation and frequency dependence of the Martian ambient noise field. The applied polarization analysis can extract the dominant back-azimuth and directional intensity of ambient noise. High-frequency (4–8 Hz) P-waves show a diurnal variation in the dominant back-azimuth that appears to be related to wind and direction of sunlight in a distant area. High-frequency Rayleigh waves (4–8 Hz) also show diurnal variation and a dominant back-azimuth related to wind direction in a nearby area.