For most of us, GPS is a no-brainer – if we need to know where we are, we fire up that transmitter and are good to go. Unfortunately, this could change in the not-so-far future.
The British BBC reports the following:
The Sun’s irregular activity can wreak havoc with the weak sat-nav signals we use.
The last time the Sun reached a peak in activity, satellite navigation was barely a consumer product.
But the Sun is on its way to another solar maximum, which could generate large and unpredictable sat-nav errors.
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Even though many of us distrust large media services when it comes to tech, their story looks very ok to me. The image below is from the NASA, and shows the earth’s magnetic field.

If the sun now emits a magnetic cloud of its own, the fields get distorted – which confuses the system. Of course, we don’t quite know how strong this will really become…