3D printing the world: developing geophysical teaching materials and outreach packages

Abstract

Measurements and models of global geophysical parameters such as potential fields, seismic velocity models and dynamic topography are well-represented as traditional contoured and/or coloured maps. However, as teaching aids and for public engagement, they offer little impact. Modern 3D printing techniques help to visualise these and other concepts that are difficult to grasp, such as the intangible structures in the deep Earth. We have developed a simple method for portraying scalar fields by 3D printing modified globes of surface topography, representing the parameter of interest as additional, exaggerated topography. This is particularly effective for long-wavelength (>500 km) fields. The workflow uses only open source and free-to-use software, and the resulting models print easily and effectively on a cheap (<$300) desktop 3D printer. In this contribution, we detail our workflow and provide examples of different models that we have developed with suggestions for topics that can be discussed in teaching and public engagement settings. Some of our most effective models are simply exaggerated planetary topography in 3D, including Earth, Mars, and the Moon. The resulting globes provide a powerful way to explain the importance of plate tectonics in shaping a planet and linking surface features to deeper dynamic processes. In addition, we have applied our workflow to models of crustal thickness, dynamic topography, the geoid and seismic tomography. By analogy to Russian nesting dolls, our "seismic matryoshkas" have multiple layers that can be removed by the audience to explore the structures present deep within our planet and to learn about ongoing dynamic processes. Handling our globes provokes new questions and draws attention to different features compared with 2D maps. Our globes are complementary to traditional methods of representing geophysical data, aiding learning through touch and intuition and making education and outreach more inclusive for the visually impaired and students with learning disabilities.

Holding the Cosmos in Your Hand: Developing 3D Modeling and Printing Pipelines for Communications and Research

“…Planetary geology and geophysics are particularly well suited areas of study for the development of 3D visualization outputs including 3D models, 3D prints, and XR. 3D visualizations of the Earth can clarify geological phenomena to the public (Kyriakopoulos, 2019), while also supplementing instruction (Koelemeijer et al, 2019) and making it more accessible (Dolphin et al, 2019) In exoplanet research, studies on the habitability of exoplanet bodies like the TRAPPIST-1 system 2 (NASA, 2019; Jet Propulsion Laboratory, 2020), and synthetic exoplanet systems (Alesina et al, 2018) have led to head-set based VR experiences for expert and non-expert audiences. 3D models have been useful in the study of asteroids (Kim, 2018) and aspects of other planetary bodies such as the atmospheres of Venus (Korycansky et al, 2002) and Titan (Charnay et al, 2014) as well as landscape evolution (Cornet et al, 2017).…”