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 ...

This record made by the seismograph is called a seismogram. When you look at a seismogram, there will be wiggly lines all across it. These are all the seismic waves that the seismograph has recorded.

This seismogram shows a 24-hour record of how much the ground moves at Weston Observatory in Weston, Massachusetts. Viewing other seismic stations will show you how much the ground moves in those ...

"I can put virtual receivers anywhere on the surface of the earth, and this tells me what the seismogram should look like from an earthquake at that location. And we can compare that to the real ...

The abrupt motion of the rock causes its seismic signal to appear abruptly on a seismogram. Even though the way they are produced is different, seismograms produced by volcano-tectonic earthquakes ...

You may choose to show a close-up of a record (seismogram) for a single earthquake event, and ask your students to point out different seismic waves. In addition, shear waves cause much more ...

There's now an entire generation of Californians who have grown up without experiencing the damaging earthquakes we saw in ...

Instead of having to figure out how to read seismogram graphs, users can simply use the app and listen to what’s happening below the Earth’s surface. “It helps enormously in trying to understand your ...

“I had heard nothing, but I checked the seismometers and found a very clear, very local signal, probably within 10 kilometres of Ballybofey, judging by the seismogram. “It seems very small but ...

Keen to delve deeper, Mr Martin looked at the seismogram, the record produced by the seismograph, from Riverview College ...