Do not use a gentle chime. Choose a loud, jarring sound (like a siren or an alarm clock). In the app, go to Settings > Sound > Custom . You can even download the official JMA alert sound (the two-tone "boop-boop" followed by a chime) from fan repositories.
The app will function, but it will only show data for Japanese earthquakes. If you live in California or Chile, you need a different system (like MyShake). JQuake is specifically built for the JMA data protocol. jquake android
JQuake Android relies on a robust infrastructure to provide users with accurate and timely earthquake information. The app's functionality can be broken down into the following components: Do not use a gentle chime