A. Barometer
B. Hygrometer
C. Seismograph
D. Thermometer
A seismograph is a scientific instrument used to detect and record seismic waves produced by earthquakes. It helps scientists determine the location, duration, and strength of an earthquake.
Modern seismographs are installed around the world to monitor earthquake activity and improve early warning systems. Although they cannot predict earthquakes, they provide valuable data that helps researchers understand Earth’s movement.