In the documentation for the Python Astro Pi API, it is stated that the values returned by get_compass_raw 'are Floats representing the magnetic intensity of the axis in teslas'.
Either my Sense HAT must be malfunctioning, or my local magnetic field is indeed ~7 times that required to levitate a frog.
I have ensured that there are no nearby devices which could possibly interfere with my results. Is this an error with the documentation? I am wondering whether the results are in fact supposed to be in milliteslas. Any clarification would be helpful.