Seasonal seismic activity on Mars

The rate of occurrence High Frequency (HF) marsquakes, as recorded by InSight at Homestead Hollow, Elysium Planitia, increased after about LS=33∘, and ceased almost completely LS=187∘, following an apparently seasonal variation with a peak near aphelion. We define seismic models based on the declination Sun, annual solar tides, CO2 cycle measured atmospheric pressure. Evaluation Akaike weights evidence ratios shows that Sun is most likely, least likely driver this activity, although discrimination weak, few events in August 2020 favor for triggering ice load. also show no periodicity related to Phobos' orbit present HF event sequence. Event forecasts are presented allow further candidate mechanisms from future observations.