obspy.signal.invsim.estimate_wood_anderson_amplitude

estimate_wood_anderson_amplitude(paz, amplitude, timespan)[source]

Calculate the Wood-Anderson amplitude equivalent.

Convert amplitude in counts measured of instrument with given Poles and Zeros information for use in estimate_magnitude(). Amplitude should be measured as full peak to peak amplitude, timespan as difference of the two readings.

Note

It is recommended to use estimate_wood_anderson_amplitude_using_response() with a Response object instead whenever possible as this prevents user errors with potentially misaligned in between units when using poles and zeros from e.g. accelerometers.

Parameters:

  • paz – PAZ of the instrument [m/s] or list of the same

  • amplitude – Peak to peak amplitude [counts] or list of the same

  • timespan – Timespan of peak to peak amplitude [s] or list of the same

Returns:

Simulated zero to peak displacement amplitude on Wood Anderson seismometer [mm] for use in local magnitude estimation.