Amplitude 10
Amplitude 10 : The size of the wiggles on an earthquake recording; more general the height of a wave-like disturbance (called waveform) from the medium (zero) level to its peak value. In seismology ground motion amplitudes are usually measured in nanometers (10-9 m) or micrometers (10-6 m). Often the double amplitude (called peak-to-peak or peak-to-trough) is measured