USGS Earthquake Data
The USGS is updating access to their earthquake data. The default is now real-time information. You just bring up a page and it will get updated as the data changes.
There are lots of options such as a minimum magnitude, for how long you want the data retained (that is, how old the earthquake is) and, of course, what part of the world you specifically want to monitor. For more details they have a quick start and user guide.
For those interested in earthquakes in or near Nicaragua, here is a URL to get you started. It opens in a new page. You can modify the characteristics to your liking. Then click SETTINGS and you can either get a new URL or set your defaults in a cookie on your computer.