Seismometer :: Seismometer (n.) An instrument for measuring the direction, duration, and force of earthquakes and like concussions..
Seismometric :: Seismometric (a.) Of or pertaining to seismometry, or seismometer; as, seismometric instruments; seismometric measurements..
Seismometry :: Seismometry (n.) The mensuration of such phenomena of earthquakes as can be expressed in numbers, or by their relation to the coordinates of space..