1. instruments that detect and record earthquakes and other ground vibrations

Examples

• Scientists use seismographs to monitor earthquake activity around the world.
• The seismographs detected tremors from the distant volcanic eruption.
• Modern seismographs can measure ground movements as small as a few nanometers.
• The university’s geology department installed new digital seismographs on campus.
• Seismographs help researchers predict potential earthquake risks in populated areas.
• The network of seismographs provides early warning systems for coastal communities.