Modern seismographs record this motion as an electrical signal, but in this activity you will build your own old-fashioned seismograph that uses a marker to record an "earthquake" on a paper strip ...

Seismographs are securely mounted to the surface of the Earth, so when the ground starts shaking, the instrument's case moves. What doesn't move, however, is a suspended mass inside the ...

Earth's tectonic plates are in constant motion and, because the plates are not all moving in the same direction, the boundaries where they meet are often violent places. Boundaries where two ...

As seismographs revolutionized geology in the 1920s, it soon became evident that the Earth was more than just a ball of dirt with a little magma mixed in. Scientists, suddenly able to monitor ...

But last week Chief Seismologist Leonard M. Murphy of the Coast and Geodetic Survey announced that Gnome’s earth waves were recorded by seismographs near Tokyo, 6,000 miles away.

NEW HAVEN >> Fifteen seismographs placed in forests, farms and backyards across northern Connecticut picked up the vibrations of a 7.9-magnitude earthquake in Papua New Guinea on Jan. 22. That ...

On Earth, we can usually pinpoint where seismic events take place by using multiple seismographs to triangulate the source. On Mars, there's only a single seismograph for the entire planet.