This question is relevant to anyone trying to compute local magnitudes (Ml) with obspy, or anyone trying to reproduce a Wood-Anderson response.
I was looking at the code of obspy.signal.invsim Wood Anderson zeros and poles, and also at the at the zeros and poles proposed by Bormann and Dewey (2014) and they are not the same.
Where does obspy Wood-Anderson zeros and poles information come from? I would like to know to use the most up-to-date information.
Bormann, P., & Dewey, J. W. (2014). The new IASPEI standards for determining magnitudes from digital data and their relation to classical magnitudes. New Manual of Seismological Observatory Practice 2 (NMSOP-2), 1–44. https://doi.org/10.2312/GFZ.NMSOP-2_IS_3.3