More modern approaches use inverse methods to calculate the reference velocity for each station pair under a set of physical contraints (Such as the Ganachaud and Wunsch reference). (realclimate.org)
The main body of contents is composed of scientific papers on the various aspects of seismology, including: investigation of specific earthquakes, theoretical and observational studies of seismic waves; inverse methods for determining the structure of the earth or the dynamics of the earthquake source; seismometry; earthquake hazard and risk estimation; seismotectonics; earthquake engineering; paleoseismology; tsunami studies. (seismosoc.org)
One type of inverse method uses the ranges of climate change fingerprint scaling factors derived from detection and attribution analyses that attempt to separate the climate response to greenhouse gas forcing from the response to aerosol forcing and often from natural forcing as well (Gregory et al., 2002a; Stott et al., 2006c; see also Section 9.4.1.4). (ipcc.ch)