These waves are called seismic or earthquake waves ... of compression waves before the arrival of shear waves using seismographs. You may choose to show a close-up of a record (seismogram ...

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 ...

So, virtually everything geologists know about Earth's deep structure is from seismographs, which record how seismic waves from earthquakes travel throughout the planet. "It's as if the only way of ...

The unit is a horizontal beam seismograph that is designed to continuously record vertical changes in ground movement. The seismogram below is refreshed once every five minutes. The seismogram above ...

Blasts from quarry or mining activity can also produce seismic waves that look like earthquakes. Natural phenomena such as storms can also cause ground vibrations. These ground vibrations from such ...

A 7.6-magnitude earthquake in the Caribbean Sea registered on a seismograph in Hardin County Saturday ... An increase in earthquake activity in the New Madrid Seismic Zone, which includes Western ...

These plates move slowly, but can cause earthquakes and volcanoes where they meet. The seismic waves produced by an earthquake are monitored and tracked. The Earth is almost a sphere. These are ...

Also, the nature of the explosive and the surrounding geological conditions can affect the propagation of seismic waves. While explosions and earthquakes may register similarly on seismographs ...