Spectrum
By Earthquake Hazards Program
2021 (approx.)
![Graph with 'Frequency (Hz)' on the x-axis and 'Relative Amplitude (dB)' on the y-axis. Colored waves show different spectrum amplitudes.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/SPECTRUM.gif?itok=wttAv-6L)
Detailed Description
The spectrum is a curve showing amplitude and phase as a function of frequency or period, or how much of each type of shaking there is from an earthquake.
Sources/Usage
Public Domain.
Image courtesy Spectra Plus Displays