Fig. 2: Estimating apparent thermal age with a Bayesian MCMC inversion of Rayleigh wave phase speed data.
From: Asymmetric seafloor depth across the Juan de Fuca Ridge caused by lithospheric heating
a Rayleigh wave phase speed map at 30 s period. Triangles represent the seismic stations used in generating the Rayleigh wave phase speed dataset35. Red and green triangles are stations of network 7D (the main component of the Cascadia Initiative experiment) deployed asynchronously. Star indicates the location of the example point of (b) and (c). b An example of phase speed variation with azimuth (ψ). Error bars show the estimated uncertainties and blue line is the best fit of the 2-ψ variation that is removed before inversion. c Rayleigh wave isotropic phase speed with period. Error bars show the estimated uncertainties and blue line is the prediction of phase speed from the mean model of the posterior distribution from the MCMC inversion. d Illustration of the model parameterization, modified from a previous publication23. Bold black text indicates the six model variables that are estimated during inversion.
