The Quake-Catcher Network (QCN) is a collaborative initiative for developing the world's largest, low-cost strong-motion seismic network by utilizing sensors in and attached to Internet-connected computers. Volunteers can help the Quake-Catcher Network provide better understanding of earthquakes, give early warning to schools, emergency response systems and others. The Quake-Catcher Network also provides educational software designed to help teach about earthquakes and earthquake hazards.