How much warning do we get of an earthquake? Seconds.
A minute would make a much bigger difference - and pretty soon we may have it. Techniques developed for gravity-wave astronomy have now been used to pick up on gravity changes associated with large movements of mass before a quake. This moves at, ya know, light speed, giving as much as a minute for people to dive for a doorway.
It might not be much, but it could save lives.
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