Comment Re:What is the impact? (Score 1) 917
The impact on GPS itself is negligible -the system's observation/ephemeris system adjusts for this sort of thing (ie: the change in Earth's rotation speed).
One possible problem with a quake shifting land masses around is simply that your electronic or paper map has just become obsolete. The coordinates from the magic box are still correct, but that trail you're attempting to follow has moved.
One possible problem with a quake shifting land masses around is simply that your electronic or paper map has just become obsolete. The coordinates from the magic box are still correct, but that trail you're attempting to follow has moved.