A seismometer is an instrument that records the shaking of the Earth's surface caused by seismic waves. The term seismograph usually refers to the combined seismometer and recording device. The first ...

Seismographs are designed to detect vibrations caused by seismic activity, a.k.a., earthquakes. Below, a graphic explains how ...

For example, cars on I-90 and I-95/Rt. 128 (especially during rush hour) cause slight vibrations in the ground that our seismometers record (this is why, in general, most seismometers are located away ...