Seismogram - Carnmenellis, Cornwall
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Seismogram - Yadsworthy, Devon
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A seismogram is a graph output by a seismograph. It is a record of the ground
motion at a measuring station as a function of time. Seismograms typically
record motions in three cartesian axes (x, y, and z), with the z axis perpendicular
to the Earth's surface and the x- and y- axes parallel to the surface. The energy
measured in a seismogram may result from an earthquake or from some other
source, such as an explosion.
Reproduced with the permission of the British Geological Survey © NERC. All rights Reserved.
Reproduced with the permission of the British Geological Survey © NERC. All rights Reserved.