The intensity of the Earth's geomagnetic field during its first two billion years remains uncertain, but could teach us about the Earth's interior composition and structure. Previous experiments have been hampered by unsuitable samples or laboratory alteration when samples are subjected to heating, which leads to underestimates of the true ancient field strength. We conduct experiments on 3.44 billion-year-old rocks from northwestern Australia to explore two new magnetic field imaging methods to compensate for this alteration effect. We preliminarily find intensities integer he 20-30 µT range, which is similar enough to present-day geomagnetic field intensities to suggest that the geodynamo has stayed remarkably stable through time.