Unravelling the magnetic histories of Earth and other terrestrial objects

14 - 15 September 2026 09:00 - 17:00 The Royal Society Free Watch online
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Discussion meeting organised by Professor Andy Biggin, Dr James Bryson, Professor Cathy Constable and Professor Wyn Williams.

This meeting will assemble researchers working across vast length and time-scales to understand the multibillion year histories of dynamos operating in the cores of Earth, the Moon, Mars, Mercury and asteroids. Its aim is to lay a platform for recent advances in data, techniques and concepts to tackle major contemporary controversies whose implications stretch far beyond geo- and planetary magnetism.

Programme

The programme, including speaker biographies and abstracts, will be available soon. Please note the programme may be subject to change.

Poster session

There will be a poster session from 5pm on Monday 14 September 2026. If you would like to present a poster, please submit your proposed title, abstract (up to 200 words), author list, and the name of the proposed presenter and institution no later than Friday 28 August 2026.

Attending the event

This event is intended for researchers in relevant fields.

  • Free to attend
  • Both virtual and in-person attendance is available. Advance registration is essential. Please register via Eventbrite for a ticket
  • Lunch is available on both days of the meeting for an optional £25 per day. There are plenty of places to eat nearby if you would prefer purchase food offsite. Participants are welcome to bring their own lunch to the meeting

Enquiries: Scientific Programmes team.

Organisers

  • Andy Biggin

    Professor Andy Biggin

  • James Bryson

    Dr James Bryson

    James is the Associate Professor of Mineralogy at the University of Oxford. His background is in the magnetism of extraterrestrial materials, namely meteorites and samples returned by space missions. James' previous research has elucidated the nature of the magnetic fields in the protoplanetary disk and those generated in asteroids, providing unique and complementary insights into the behaviours of these objects. James' current research focusses around his ERC Starting Grant in which he is using novel measurements of the magnetic signatures and isotopic compositions of meteorites to uncover the suite of processes that built the terrestrial planets in the solar system. This has the potential to illuminate the cascading series of events that ultimately led to the Earth becoming habitable.

  • Cathy Constable

    Professor Cathy Constable

    Cathy Constable is a Distinguished Professor at the Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California at San Diego. She moved there after completing her BSc and MSc in Australia and has occupied a variety of academic and administrative positions. She is a fellow of the American Geophysical Union and of the American Association for the Advancement of Science, and a recipient of the RAS Price Medal. Her research is mainly on Earth’s magnetic field with particular interests in its decadal to multi-million-year variations and how the changing structure of the magnetic field and extreme events like geomagnetic reversals can inform scientists about processes in Earth’s deep interior. She also uses magnetic observatory and satellite magnetic field observations to study the electrical conductivity of Earth’s mantle and is an active proponent of the development of databases and cyberinfrastructure allowing electronic access to paleomagnetic and rock magnetic data.

  • Professor Wyn Williams

    Professor Wyn Williams

    Dr Williams is professor of mineral magnetism at the University of Edinburgh, with over 35 years’ experience in teaching and research in computational geophysics and planetary physics. His research focuses on the magnetic recording fidelity of naturally occurring minerals, and micromagnetic analysis of magnetic structures in fine particles. He produced one of the first unconstrained three-dimensional models of magnetic domain structure and principal author of MERRILL, an open-source finite element micromagnetic solver for the Earth Sciences.

Schedule

09:00-09:05 Welcome by the Royal Society and lead organiser
09:05-09:30 Nanomagnetic imaging
Professor Richard Harrison

Professor Richard Harrison

University of Cambridge, UK

09:30-09:45 Discussion
09:45-10:10 Magnetism of first planetesimals
10:10-10:25 Discussion
10:25-10:50 Break
10:50-11:15 Quantum diamond microscopy
Dr Lennart de Groot

Dr Lennart de Groot

Utrecht University, The Netherlands

11:15-11:30 Discussion
11:30-11:55 Magnetic domain states and palaeomagnetic recording fidelity
11:55-12:10 Discussion

13:10-13:35 Sample return missions
13:35-13:50 Discussion
13:50-14:15 Particles to planets
14:15-14:30 Discussion
14:30-15:00 Break
15:00-15:25 Martian magnetism
15:25-15:40 Discussion
15:40-16:05 Non-dipole structures in the geomagnetic field
16:05-16:20 Discussion
16:20-17:00 Poster flash talks

09:00-09:25 Planetary magnetic fields
09:25-09:40 Discussion
09:40-10:05 The Moon’s magnetic history
Professor Sonia Tikoo

Professor Sonia Tikoo

Stanford University, US

10:05-10:20 Discussion
10:20-10:50 Break
10:50-11:15 Anomalous geomagnetic fields in Earth’s deep past
Dr Annique van der Boon

Dr Annique van der Boon

University of Oslo, Norway

11:15-11:30 Discussion
11:30-11:55 Geodynamo + core evolution
Professor Christopher Davies

Professor Christopher Davies

University of Leeds, UK

11:55-12:10 Discussion

13:10-13:35 Coevolution of the core, magnetosphere, and life
13:35-13:50 Discussion
13:50-14:15 Global reconstructions of the palaeomagnetic field
14:15-14:30 Discussion
14:30-15:00 Break
15:00-15:25 Magnetism of early Earth
15:25-15:40 Discussion
15:40-16:05 Palaeomagnetism of samples returned by Chang’E 6
Dr Shuhui Cai

Dr Shuhui Cai

Institute of Geology and Geophysics, Chinese Academy of Sciences, China

16:05-16:20 Discussion
16:20-16:45 Apparent polar wander paths and their errors

Earth is the only terrestrial planet with a long-lived dynamo-driven magnetic field and the ancient magnetic field recorded in surface rocks is the only quantitative way of reconstructing continents before the Cretaceous. Paleomagnetic results can be expressed in terms of paleopoles that are calculated using the geocentric axial dipole field model. Those paleopoles can in turn be used to construct apparent polar wander paths (APWPs), which record the motion of the polar axis relative to a fixed continent. The two most common methods for generating APWPs are the running mean and the spherical smoothing spline methods. Here we extend the spherical smoothing spline approach for APWP construction by propagating age, directional, and flattening-correction uncertainties through a Monte Carlo framework. Uncertainty in the spline paths was quantified by sampling these error sources from their respective distributions. For each synthetic pseudo-pole realization, we computed a smooth spline path where we also let the smoothing parameter vary randomly, thereby propagating uncertainty associated with spline regularization. Spline paths were evaluated at 10 Myr intervals, and the ensemble was used to derive mean spline paths with 95% confidence regions for the major continental blocks for the past 540 Myrs and a global APWP since the assembly of Pangea at 320 Ma. The spherical spline method is superior to the running mean technique, particularly in intervals with poor data coverage or where pole ages are unevenly distributed.

Professor Trond Helge Torsvik

Professor Trond Helge Torsvik

University of Oslo, Norway

16:45-17:00 Discussion