seismographic


seis·mo·graph

S0221200 (sīz′mə-grăf′)n. An instrument for automatically detecting and recording the intensity, direction, and duration of a movement of the ground, especially of an earthquake.
seis·mog′ra·pher (sīz-mŏg′rə-fər) n.seis′mo·graph′ic (-grăf′ĭk), seis′mo·graph′i·cal (-ĭ-kəl) adj.seis·mog′ra·phy n.