Frequency-Amplitude Limits for Earthquakes

Frequency - Amplitude plot for octave wide band-passes for a range of ground motions.

Y-axis is octave wide band-passed acceleration. Dynamic ranges of various instruments, including proposed hypothetical low-gain velocity recording strong motion seismometer superimposed, as well as USGS High and Low Noise Models.

Figure 1 : with FBA-23 and STS-2 only

(adapted from Seismological Research Letters, May/June 2002)

Figure 2 : with FBA-23, STS-2 and comparison with a hypothetical strong motion velocity sensor