If a structure (a building, road, etc.)
When an earthquake causes the ground to shake, the base of the seismograph shakes too, but the hanging weight does not.
The results are known as uniform-hazard ground motion Instead the spring or string that it is hanging from absorbs all the movement. The difference in position between the shaking part of the … But in this case, there were plenty of cracks in the ground directly related to fault movement, Valkaniotis said. These displacements are used by seismologists to understand the earthquake source in detail. From these hazard curves, the ground motion amplitudes for a user-specified mean annual frequency can be interpolated and then mapped.