Lamont-Doherty Earth Observatory of Columbia University is dedicated to understanding how planet Earth works, in all of its physical manifestations.

Welcome to the Lamont-Doherty Cooperative Seismographic Network (LCSN) Home Page! Here you will find information about the Lamont-Doherty Cooperative Seismographic Network (LCSN), along with information on earthquakes in the Eastern United States and seismology. You can access this information by selecting one of the buttons to your left. We hope you will find this site interesting and ...