Abstract
We present SubMachine, a collection of web‐based tools for the interactive visualization, analysis, and quantitative comparison of global‐scale data sets of the Earth's interior. SubMachine focuses on making regional and global‐scale seismic tomography models easily accessible to the wider solid Earth community, in order to facilitate collaborative exploration. We have written software tools to visualize and explore over 30 tomography models—individually, side‐by‐side, or through statistical and averaging tools. SubMachine also serves various nontomographic data sets that are pertinent to the interpretation of mantle structure and complement the tomographies. These include plate reconstruction models, normal mode observations, global crustal structure, shear wave splitting, as well as geoid, marine gravity, vertical gravity gradients, and global topography in adjustable degrees of spherical harmonic resolution. By providing repository infrastructure, SubMachine encourages and supports community contributions via submission of data sets or feedback on the implemented toolkits.
Highlights
Seismic tomography is a powerful geophysical imaging method that has been yielding increasingly detailed structural information about the Earth’s deep interior
Tectonic Plate Reconstructions To facilitate the linking of mantle structure with plate motion histories, SubMachine provides the functionality to overlay reconstructed plate boundaries and/or coastlines on seismic tomography models and vote maps
Normal Mode Observations Normal modes, the solid Earth’s free oscillations, are frequency-split due to 3-D heterogeneities that break the spherical symmetry. Some of this frequency splitting is caused by the same mantle heterogeneities that are imaged by body and surface-wave tomography models
Summary
Seismic tomography is a powerful geophysical imaging method that has been yielding increasingly detailed structural information about the Earth’s deep interior. IRIS EMC does not serve the complementary data sets that SubMachine supports, such as marine gravity, vertical gravity gradient, geoid, global topography, global crustal structure, normal mode observations, vote maps, and time-dependent plate reconstructions. This currently include models of the geoid (Pavlis et al, 2012), free-air gravity (Sandwell et al, 2014), vertical gravity gradient (Sandwell et al, 2014), and topography and bathymetry (Olson et al, 2014), all in adjustable spherical.
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