3 ms·

You compare it with other phones in the nearby area.

• BurningFrog 7y ago
  Right. At any time, most phones will be lying on something like a table. If they all sense something, it's a big external event.
  • lm28469 7y ago
    So you compare each and every devices state every X seconds to determine if somethings that statistically never happens is happening? I can't be the only thinking this is nonsense. Just install a bunch of actual earthquake detectors and make them send notifications via already existing alert systems.
    • BurningFrog 7y ago
      I'm just saying it can be done. Not that it should be the new gold standard. A less chatty implementation would be if each phone only contacted the server when it sensed a possible quake. If it gets a few correlated hits, it can even send out a "hey did everyone feel that?" question.