Nature Astronomy, Published online: 27 October 2022; doi:10.1038/s41550-022-01796-8

A method that uses intersource correlograms measured by a single-station seismograph to constrain planetary interiors is presented. Applied to Mars, it measures a core radius of 1,812 ± 20 km, consistent with InSight direct-seismic-wave measurements. Such a method is useful in planetary exploration where the deployment of a full network of seismographs is unlikely.

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