AxiSEM3D: efficient 3D wave propagation across scales and worlds

Benjamin Fernando , Kuangdai Leng, Jonathan Wolf , Jarett Baker-Dunn, Timothy J Craig, Will Eaton, Matheo Fouchet, Claudia Haindl, Timo Heister, Lorraine Hwang , Maureen Long, Adrian Marin Mag , Angela Marusiak, Jack Muir, Ceri Nunn, Alexandre Szenicer, Andrew Walker , Tarje Nissen-Meyer

We present a new, unified release of the AxiSEM3D seismic modelling code, which is able to rapidly and efficiently compute synthetic seismograms for the Earth and many other worlds. Over the past decade, separate and incompatible versions of AxiSEM3D's main branch have been developed and individually benchmarked, including new capabilities such as the inclusion of fluid oceans and atmospheres, full anisotropy, local- and regional-scale Cartesian domains, sensitivity kernels, and distributed (finite-fault) sources. This release (version 2.1) consolidates those previously disparate branches into a single, cross-compatible, community-maintained codebase. The release includes substantially expanded documentation with simplified end-to-end installation and use instructions; a suite of eleven ready-to-run templates for terrestrial, planetary, and stellar applications; and tools for producing wavefield visualisations and other derived products such as sensitivity kernels.