Burying depth of InSight seismometer module under three wind-speed conditions. The red and black curves represent the required burying depths where the horizontal and vertical compliance values, respectively, are reduced to 10 per cent of the ones at the ground surface. Compliance varying with depth at InSight landing site is illustrated in Fig. S3. The dotted grey line indicates the thickness of the surface fine-sand regolith, 0.6 m.