Maybe for this kind of events (when people need to hide) you should postpone the push until the situation become calmer?<p>On the other side, the push notification can alert people yet unaware of the situation, and save their life.<p>I guess we will have to wait until Facebook brilliant AI team can automagically figure when it&#x27;s pertinent to push that crucial notification!<p>What kind of context hints could be used? heartbeat rate? analyzing ambient sounds like screams, detonations, explosions, or silence? analyzing surrounding voices to detect emotions like anger, distress, pain or fear in smartphone owner voice or other people? extracting dangerous location from media streams, and correlate with geolocalized users&#x27; positions? using other geolocalized users&#x27; answers (safe&#x2F;not safe)?<p>I&#x27;m aware some proposition are not really realistic (yet) or somehow really creepy.<p>--<p>Also, back to earthquakes, using context hints of lot of smartphones going from &#x27;still&#x27; state to &#x27;tilting&#x27; state, in a relatively localized region, could you detect earthquakes occurring quasi real-time? and push a warning notifications to your friends faster than the quake waves? « possible incoming quake in 5 seconds, brace yourself » ( à la <a href="https:&#x2F;&#x2F;xkcd.com&#x2F;723&#x2F;" rel="nofollow">https:&#x2F;&#x2F;xkcd.com&#x2F;723&#x2F;</a> )