Seismology is a free education and reference application available for Android devices. This app provides the latest earthquake information from the USGS, Mexican, and Chilean seismographic services. You can customize the app to receive notifications of nearby earthquakes with the ability to fine-tune the magnitude and distance for notifications.

One of the best features of Seismology is that it doesn't use any resources when it's turned off. You can receive fast notifications of nearby earthquakes without using battery or network resources. This app is incredibly useful for people who live in areas that are prone to earthquakes or for those who are interested in studying seismic activity.

Overall, Seismology is a great app for staying informed about the latest earthquakes and receiving instant notifications of nearby earthquakes. It's easy to use, customizable, and doesn't use any resources when it's turned off.