Originally Posted by
Stringer
Yes, but not nearly as much.
As I understand it, there’s much less to be permanently affected by magnetism within a regular analogue quartz i.e. no hairspring, balance wheel etc.
However, a quartz works via drive from a tiny little magnetic stepper rotor, which is itself driven by a magnetic field (generated by the coil), so yes, magnetism can interfere with that, potentially stopping or slowing the hands, but in most cases the watch will go back to normal as soon as the magnetic field from the outside source is removed, and the watch will carry on as normal thereafter, with little or no ill-effects (aside from being a little slow due to that period of stopping, perhaps).
Mechanicals are different, because the integral time-keeping parts can themselves become magnetised, such that they retain a level of magnetism, even after the outside magnetic source is long removed, hence why demagnetising is required.
I think most standard GS HAQ models already have a half-decent level of anti-magnetic capability as well, around 60 gauss, which will be fine to offer protection against the majority of magnets encountered daily e.g. fridge magnet or phone/ipad cover.
I wouldn’t worry.