Magnetotellurics (MT) provides critical constraints on Earth’s electrical conductivity structure and thereby illuminates lithosphere and mantle processes. The EarthScope USArray MT program provides a unique opportunity to investigate large-scale tectonic and compositional variations across the contiguous United State...
Si-Hong Wu, Jia-Jia Sun, Di-Kun Yang et al.· Geophysical Journal Internat...· 0 citations
Electrical resistivity is a fundamental physical property that provides powerful constraints on subsurface structure, lithology, fluid distribution, and mineralization. We present a continental-scale electrical resistivity model of Australia's shallow crust with quantified uncertainty, extending to depths of up to ~650...
Variational inference has emerged as a computationally efficient framework for solving Bayesian inverse problems. Rather than relying on random sampling in high-dimensional model spaces, it reformulates probabilistic inference as an optimization problem, marking a fundamental shift from sampling-based to optimization...
Jia-Jia Sun, Si-Hong Wu· The Leading Edge· 0 citations
Geophysical inversion is inherently non-unique, and efficient uncertainty quantification remains a major challenge for large-scale applications. Conventional Bayesian approaches, such as Markov chain Monte Carlo (McMC), provide rigorous posterior estimates but are often computationally prohibitive, while deterministi...
