Unravelling the magnetic histories of Earth and other terrestrial objects
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
Schedule
| 09:00-09:05 |
Welcome by the Royal Society and lead organiser
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| 09:05-09:30 |
Nanomagnetic imaging
Professor Richard HarrisonUniversity of Cambridge, UK
Professor Richard HarrisonUniversity of Cambridge, UK Richard Harrison is Professor of Earth and Planetary Materials at the University of Cambridge. He leads the NanoPaleoMagnetism research group that was established in 2013 via the award of an ERC Advanced Grant. Harrison employs an innovative combination of experimental and computational techniques to study magnetism in natural and synthetic materials, with particular emphasis on nanoscale processes. |
| 09:30-09:45 |
Discussion
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| 09:45-10:10 |
Magnetism of first planetesimals
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| 10:10-10:25 |
Discussion
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| 10:25-10:50 |
Break
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| 10:50-11:15 |
Quantum diamond microscopy
Dr Lennart de GrootUtrecht University, The Netherlands
Dr Lennart de GrootUtrecht University, The Netherlands Lennart de Groot is Associate Professor at the Paleomagnetic Laboratory, Fort Hoofddijk, Utrecht University. His research centres on reconstructing Earth's short-term magnetic field behaviour by developing innovative techniques, including the use of quantum diamond microscopy to access micro- to nanoscale magnetic recording in rocks. His work has contributed to improving the recovery of robust paleomagnetic signals from challenging materials and to refining understanding of field instability in the Southern Hemisphere, including the evolution of the South Atlantic Anomaly. He holds an ERC Consolidator Grant and previously received an ERC Starting Grant as well as VENI and VIDI awards from the Dutch Research Council. He is a recipient of the AGU William Gilbert Award and the Vening Meinesz Prize. He leads an internationally active research group. Beyond his research, he established a science theatre initiative, now in its sixth season, that trains PhD candidates in communicating science on stage. |
| 11:15-11:30 |
Discussion
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| 11:30-11:55 |
Magnetic domain states and palaeomagnetic recording fidelity
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| 11:55-12:10 |
Discussion
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| 13:10-13:35 |
Sample return missions
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| 13:35-13:50 |
Discussion
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| 13:50-14:15 |
Particles to planets
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| 14:15-14:30 |
Discussion
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| 14:30-15:00 |
Break
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| 15:00-15:25 |
Martian magnetism
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| 15:25-15:40 |
Discussion
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| 15:40-16:05 |
Non-dipole structures in the geomagnetic field
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| 16:05-16:20 |
Discussion
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| 16:20-17:00 |
Poster flash talks
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| 09:00-09:25 |
Planetary magnetic fields
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| 09:25-09:40 |
Discussion
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| 09:40-10:05 |
The Moon’s magnetic history
Professor Sonia TikooStanford University, US
Professor Sonia TikooStanford University, US |
| 10:05-10:20 |
Discussion
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| 10:20-10:50 |
Break
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| 10:50-11:15 |
Anomalous geomagnetic fields in Earth’s deep past
Dr Annique van der BoonUniversity of Oslo, Norway
Dr Annique van der BoonUniversity of Oslo, Norway Annique van der Boon is a paleomagnetist at the University of Oslo (Norway), and principal investigator of the PANDA project (Norwegian Research Council Young Research Talent). Her research has focused on enigmatic intervals of Earth’s history (notably the Devonian) and more recently on developing and validating novel recorders of Earth's magnetic field. She is intrigued by the expression of natural phenomena as recorded by rocks, and what rocks can tell us about the history of our planet. Annique is a firm believer that fieldwork and science communication are essential components of Earth science and is committed to building collegial, collaborative and inclusive research environments that enable ambitious, curiosity-driven science. |
| 11:15-11:30 |
Discussion
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| 11:30-11:55 |
Geodynamo + core evolution
Professor Christopher DaviesUniversity of Leeds, UK
Professor Christopher DaviesUniversity of Leeds, UK |
| 11:55-12:10 |
Discussion
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| 13:10-13:35 |
Coevolution of the core, magnetosphere, and life
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| 13:35-13:50 |
Discussion
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| 13:50-14:15 |
Global reconstructions of the palaeomagnetic field
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| 14:15-14:30 |
Discussion
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| 14:30-15:00 |
Break
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| 15:00-15:25 |
Magnetism of early Earth
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| 15:25-15:40 |
Discussion
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| 15:40-16:05 |
Palaeomagnetism of samples returned by Chang’E 6
Dr Shuhui CaiInstitute of Geology and Geophysics, Chinese Academy of Sciences, China
Dr Shuhui CaiInstitute of Geology and Geophysics, Chinese Academy of Sciences, China Dr Shuhui Cai is a professor at the Institute of Geology and Geophysics, Chinese Academy of Sciences. She studies the evolution of the Earth’s and Moon’s magnetic fields and their underlying dynamo processes. Her research integrates archaeomagnetism, paleointensity reconstruction, and planetary magnetism, with a focus on the long-term evolution of the geomagnetic field and the lunar magnetic field. She constructed a Holocene geomagnetic reference curve and a regional field model for East Asia, identifying episodes of abrupt geomagnetic variation. She further revealed a geomagnetic low anomaly in Southeast Asia and proposed that magnetic flux expulsion at the core–mantle boundary may be widespread at low latitudes, providing new constraints on core–mantle boundary structure and geodynamo simulations. In addition, she obtained key evidence for the operational state of the lunar dynamo during the Moon’s middle evolutionary stage. Her results suggest that after an early rapid decline, the lunar magnetic field may have rebounded around 2.8 Ga, and that a weak magnetic field still existed at ~2.0 Ga, thereby revising the prevailing framework of lunar magnetic field evolution. Her work has been published in leading journals, including Nature, Science Advances, and Proceedings of the National Academy of Sciences. Dr Cai has served as Principal Investigator and key contributor on multiple projects funded by the National Natural Science Foundation of China and the Chinese Academy of Sciences (CAS). She received the Fu Chengyi Young Scientist Award from the Chinese Geophysical Society in 2019. In 2020, she was named a core member of the Ministry of Science and Technology’s Innovative Talent Promotion Program in the key area of “Geomagnetic Field Evolution and Its Applications.” In 2022, she was a key contributor to the team awarded the CAS Prize for Outstanding Scientific and Technological Achievement for research on the biological effects of geomagnetic field variations. More recently, she was selected for the “Phoenix Program” Outstanding Young Talent Award (Beijing, 2024), received the inaugural Tengchong Young Scientist Award (2025), and was honoured with the Tan Kah Kee Young Scientist Award (2026). She currently serves on the editorial working group of National Science Review and as a Youth Editorial Board Member of Earth and Planetary Physics. |
| 16:05-16:20 |
Discussion
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| 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 TorsvikUniversity of Oslo, Norway
Professor Trond Helge TorsvikUniversity of Oslo, Norway Professor in Geodynamics at the University of Oslo and founding Director of two Norwegian Centers of Excellence, the Center for Earth Evolution and Dynamics (CEED: 2013-2023) and the Center for Planetary Habitability (PHAB: 2023-2033). Torsvik is an expert in paleomagnetism, Earth History, paleogeography, plate tectonics and mantle dynamics. He is a member of the Norwegian Academy and awarded the prestigious Wollaston Medal (Geological Society London) in 2024, the Fridjof Nansen Medal (Norwegian Academy of Science and Letters) in 2017, and the Arthur Holmes Medal (European Union of Geosciences) in 2016 among various other awards and prizes. He has written more than 250 articles and one book - Earth History and Palaeogeography (Cambridge University Press, 2017) - which received the PROSE Award in 2018 for best Earth Sciences book. |
| 16:45-17:00 |
Discussion
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