The Earth's crust is made up of tectonic plates. These plates are constantly moving and when they rub against one another, it causes an earthquake. So the thing that is shaking is the Earth's crust.
"Seismic" refers to an earthquake, so seismic shaking is the shaking motion of the earth (and things on it) caused by an earthquake. There are different waves that emanate from the hypocenter, or point of origin.
There is an earthquake
A shaking of the crust of the Earth could symbolize an Earthquake. This shaking of the crust can be measured with special machines.
seismoscope
The amount of shaking produced by an earthquake at a given location is called the intensity.
i depends where the earthquake is.
Yes, shaking is a primary characteristic of earthquakes
Tremors
Tremors
shaking ground and cracking
Seismograph.
sudden shaking of the ground