
The plugin itself establishes a long-lived websocket connection to EMSC-seismicportal (www.seismicportal.eu/) and whenever an earthquake happens anywhere in the world, EMSC pushes the related message to the plugin. And since you will not be interested in all but only your surrounding, you can give radius and magnitude parameters.
Please note that this plugin is in beta at its best, and somewhat has a dirty code
For Turkish, Italian and Greek friends (mostly the mediterranean coasts) in which earthquakes are almost daily, i believe this plugin might be of some value.
Regards...
Plugin address: https://github.com/febalci/DomoticzEarthquake