I'm not quite sure I understand the purpose of the app. I would have to actually check the app during an earthquake to have it tell me yes? Well, in that case I would already know that there is an earthquake near me.

Maybe a better title would be "Was there an earthquake near me?" and you could show nearby earthquakes in the past hour, day, etc. However, there are already a lot of sites that do something like that such as http://earthquake.usgs.gov/earthquakes/index.php, so I'm not quite sure what additional value you could add.