The Jamaica Seismograph Network (JSN) consists of thirteen broadband seismograph stations (figure above) used for the continuous monitoring of seismic activity. The data from this network are used to determine magnitude and location of earthquakes in the Unit’s earthquake database.

Along with the broadband seismographs are accelerograph sensors which record significant ground motion in their immediate vicinity and are triggered by local earthquakes of magnitude 4 and higher.   The JSN accelerographs along other such sensors installed at some key institutions around the island comprise the Jamaica Strong Motion Accelerograph Network (JSMAN).  Accelerograph data are used to delimit strong ground shaking and thereby determine areas with a high potential for damage.