nostr:npub1x3azxuysp5vmfer4vgs4jn5tmfcx4ew8sh0qnev7gczljxsr7jwqa3g4el Are you ever heard "JQuake"?

Yes, there a software called "JQuake" where people in Japan can download, monitor seismic events across Japan, and giving an alert if there are an incoming seismic.

As you can see in livestream below of "JQuake" software, you can see if Japan is almost everyday had some of small earthquakes.

https://www.youtube.com/watch?v=Qogkj93oz7I