Can you elaborate this more? I know about continental drifts and I know they occur at a scale much larger than a tiny box. Does it have any effect on the small scale a tiny box would be buried in if we are not burying the box near fault lines?

Australia is clipping along at 2.7”/year (about 1/16 of a meter).

That doesn’t seem like much, but in a few decades your hole is going to need to be pretty big.

IANAGeologist, but couldnt you calculate and compensate for that? Its not like continental drift is random and unpredictable (afaik, i know nothing of this subject)

Oh sure, but I know I'd get around to thinking of it after I'd moved a couple tons of dirt with a spade.