Seismograph

Seismograph in the National Security Context

A definition and brief description of Seismograph in relation to national security is as follows:An instrument that measures and records elastic ground vibrations called seismic waves that are generated by earthquakes and man-made explosions. Seismology has been an important tool for the remote detection of large explosions, especially underground nuclear tests, for many years and is expected to play an important role in Comprehensive Test Ban Treaty verification.