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Articles | Volume 17, issue 5
Articles | Volume 17, issue 5
https://doi.org/10.5194/se-17-789-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-17-789-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 17, issue 5
Research article
 | 
22 May 2026
Research article |  | 22 May 2026

Basic Earth Parameters from VLBI observations using Bayesian inversions in the time domain: updated insights of the Earth's interior

Yuting Cheng, Véronique Dehant, Attilio Rivoldini, Jérémy Rekier, and Christian Bizouard

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Cited articles

Aubert, J.: Flow throughout the Earth's core inverted from geomagnetic observations and numerical dynamo models, Geophys. J. Int., 192, 537–556, 2013. a
Buffett, B., Mathews, P., and Herring, T.: Modeling of nutation and precession: effects of electromagnetic coupling, J. Geophys. Res.-Sol. Ea., 107, ETG-5, https://doi.org/10.1029/2000JB000056, 2002. a, b, c, d, e
Carter, W., Robertson, D., Pettey, J., Tapley, B., Schutz, B., Eanes, R., and Lufeng, M.: Variations in the Rotation of the Earth, Science, 224, 957–961, 1984. a
Chao, B., Ray, R., Gipson, J., Egbert, G. D., and Ma, C.: Diurnal/semidiurnal polar motion excited by oceanic tidal angular momentum, J. Geophys. Res.-Sol. Ea., 101, 20151–20163, 1996. a, b, c, d, e
Cheng, Y. and Bizouard, C.: Effect of the ocean tide on the Earth nutation: an updated assessment, Adv. Space Res., 75, 5245–5253, https://doi.org/10.1016/j.asr.2025.02.009, 2025. a, b, c, d, e, f, g, h, i, j, k, l
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By analyzing 45 years of Very Long Baseline Interferometry data, we found that the liquid outer core and solid mantle are more strongly coupled than expected, likely due to topography at their boundary. The solid inner core is also less rigidly connected to the outer core. These results challenge current models of Earth's deep interior, core dynamics, and magnetic field generation, with implications for geophysics and space navigation.
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