Tesla: Why compass works if the earth has a weak magnetic field?

We bought and attempted the magnetic field strength is what we discovered: Question by David J : Why compass operates if the earth has a weak magnetic field How compass functions if the earth has a weak magnetic field? It seems that when the earth has only a 1/two Guass magnetic power, it seems, compass "ought to not" have worked today, our firm has produced many artificial things that significantly much more power magnetic ... Looks like magnetic interference distort compass in this day and

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