This app was mentioned in 6 comments, with an average of 2.33 upvotes
Ini ada aplikasi bagus, bakal kirim notif gempa kalau gempanya jaraknya dekat dengan posisi user Link Google Play Link App Store
It looks like this one: https://play.google.com/store/apps/details?id=org.emsc_csem.lastquake&hl=en
Eu folosesc aplicatia celor de la European-Mediterranean Seismological Centre (EMSC):
http://www.emsc-csem.org/about/ https://play.google.com/store/apps/details?id=org.emsc_csem.lastquake
It's interesting also that both the USGS and the EMSC do things similar to what Brainstorm does: the USGS monitors tweets to be informed of potential events before they are actually recorded (although I think they only use this internally), while the EMSC geolocates website visits on the assumption that if many people visit their website from the same location, there was probably an event there. Unlike the USGS, the EMSC does report publicly on these potential events on their @LastQuake Twitter account, and now that they also have an app for that (which I wish was open source, but unfortunately, unlike in the US, there is no obligation for "public" stuff to be released under free licenses in the EU), they also use app launches and reports from inside the app as sources for this system, and here is an example of that in action doing science about this very California earthquake.
Evo, ako hoces bit siguran:
https://play.google.com/store/apps/details?id=org.emsc_csem.lastquake
I used to have last quake on my old phone, found it to be decently informative. https://play.google.com/store/apps/details?id=org.emsc_csem.lastquake