Conveners
SWR3 – Inner Magnetospheric Dynamics and Coupling Processes: orals - part 1
- Alexander Lozinski (UCLA)
- Ravindra Desai (University of Warwick)
- Sarah Glauert (British Antarctic Survey)
SWR3 – Inner Magnetospheric Dynamics and Coupling Processes: Orals - part 2
- Ravindra Desai (University of Warwick)
- Sarah Glauert (British Antarctic Survey)
- Alexander Lozinski (UCLA)
SWR3 – Inner Magnetospheric Dynamics and Coupling Processes: Orals - part 3
- Alexander Lozinski (UCLA)
- Sarah Glauert (British Antarctic Survey)
- Ravindra Desai (University of Warwick)
SWR3 – Inner Magnetospheric Dynamics and Coupling Processes: Orals - part 4
- Alexander Lozinski (UCLA)
- Ravindra Desai (University of Warwick)
- Sarah Glauert (British Antarctic Survey)
Description
The inner magnetosphere hosts a dynamic range of plasma populations including the relativistic radiation belts, the ring current and cold plasmaspheric ions. These populations are tightly coupled via a range of micro-, meso- and macro-scale processes, driving a complex interplay of acceleration, transport and loss. For example, chorus waves are generated by injected plasma sheet electrons and then accelerate 100’s keV electrons to relativistic energies to form the radiation belts, with this acceleration being most efficient in regions of low plasma density. In turn, precipitation of radiation belt particles into the atmosphere balances ionospheric outflows of cold plasma into the inner magnetosphere. Further research into these and other cross-scale couplings is essential to develop the capability to reliably forecast inner magnetospheric dynamics and associated space weather risks and impacts. This session calls for observational, modelling and theoretical studies related to the inner magnetospheres, as well as review papers and mission concepts as well as comparative studies with other magnetospheres. We invite observational contributions from current missions such as Arase, Themis, MMS and GPS, from ground-based facilities such as EISCAT, SuperDARN and VLF receivers, and from historical datasets such as from the Van Allen Probes, Cluster and climatological studies involving even earlier solar cycles. We invite numerical contributions spanning Fokker Planck simulations, kinetic simulations of wave-particle interactions, and of the global magnetosphere and its couplings to the ionosphere and solar wind, as well as novel machine learning approaches and solutions.
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Dr Mai Mai Lam (British Antarctic Survey)05/11/2025, 15:00Oral
Inner magnetospheric dynamics and coupling processes are highly dynamic, in part due to the interaction of electrons with a variety of electromagnetic waves. Here we present a novel combination of observations made in Fennoscandia that reveal energetic electron precipitation into the D-region ionosphere due to these coupling processes. We identify various magnetospheric phenomena, including...
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Xueyi Wang (Auburn University, Alabama, USA.)05/11/2025, 15:15Oral
Particle precipitation is a significant energy input into the Earth’s ionosphere and plays an important role in magnetosphere-ionosphere coupling. Previous studies employed test particle simulations to investigate wave-particle interaction and associated precipitation, in which the wave evolution is presumed and the particle feedback to waves is neglected. In this study, we employ a...
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Mark Clilverd (British Antarctic Survey)05/11/2025, 15:30Oral
In this study, we investigate the temporal responses of trapped relativistic electron fluxes in the heart of the outer radiation belt during three geomagnetic storm periods. We relate satellite observations of relativistic electron fluxes to the variations in electron precipitation made using VLF subionospheric propagation techniques, which are sensitive to D-region ionisation levels. Such...
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Constantinos Papadimitriou (Department of Physics, National and Kapodistrian University of Athens, Greece; National Observatory of Athens, Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, Penteli, Greece; Space Applications Research and Consultancy (SPARC), Athens, Greece)05/11/2025, 15:45Oral
Radial diffusion, driven by ultra-low frequency (ULF) waves, is a key process contributing to the acceleration and loss of electrons in the outer radiation belt by contributing to their inner or outer transport. Ground magnetometers give us continuous observations of such ULF waves but their usefulness is limited by the models used to transform ground measurements into their progenitor fields...
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Jaeyoung Kwak (Korea Astronomy and Space Science Institute)05/11/2025, 16:00Oral
Electromagnetic ion cyclotron (EMIC) waves are generated in the equatorial regions of the inner magnetosphere. These waves propagate to the middle or low latitudes in the ionosphere through the ionospheric duct, detected as Pc1 waves by ground-based magnetometers. To figure out how the Pc1 wave power attenuates during propagation in space and on the ground, we investigated a magnetically...
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Livia Alves (INPE - National Institute for Space Research)05/11/2025, 16:15Oral
Paulikas and Blake first approached the relationship between relativistic electron flux and solar wind speed in late 1979 and found a linear correlation when considering averages of solar wind speed and geosynchronous relativistic outer radiation belts electron flux for three different time intervals (1 day, 27 days, and 180 days). Many years later, Reeves et al., 2011 expanded the analyses...
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Evangelia Christodoulou (National and Kapodistrian University of Athens)06/11/2025, 10:45Oral
Motivated by the need for improved radiation environment modeling, this study investigates the drivers behind sub-relativistic electron flux variations in the inner magnetosphere. We utilize electron flux measurements between 1 to 500 keV from the Hope and MagEIS instruments on board the RBSP satellites and the FEEPS instruments on board the MMS spacecraft. along with solar wind parameters and...
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Natalia Buzulukova (University of Maryland - PHaSER/NASA GSFC, US)06/11/2025, 11:00
We investigate operational anomalies on GOES spacecraft that are attributed to shallow internal charging driven by enhanced flux of 100 - 300 keV electrons. This population is not traditionally associated with either surface charging (dominated by electrons with energies 10s of keV) or deep dielectric charging (typically linked to MeV-range electrons). Using data from 2017-2021 during the...
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Consuelo Cid (Universidad de Alcala)06/11/2025, 11:15Oral
Fifty years after the Burton equation proposal for the coupling between solar wind and magnetosphere, as quantified by the Dst index, this work proposes a missing term for the injection of energy from the solar wind into the ring current. This term is associated with Alfvén waves and allows us to explain the linear trend observed in the recovery phase of Dst or SYM-H indices during the passage...
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Dedong Wang (GFZ German Research Centre For Geosciences)06/11/2025, 11:30Oral
During 10-19 May 2024, the largest storm in the past 20 years took place, characterized with minimum Dst index of -412 nT. In the storm main phase, dropouts of >700 keV relativistic electrons are observed by Arase and NOAA 18 satellites throughout the outer radiation belts. During the storm recovery phase, the fluxes of relativistic electrons locally increase by about more than two orders of...
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Yihui Tong (University of Warwick)06/11/2025, 11:45Oral
The radiation-belt electron flux exhibits dramatic variations across a range of spatial and temporal scales, including global‐scale radial transport, mesoscale injections, and local‐scale wave‐particle interactions. Long-term variability has been successfully captured by solving the Fokker Planck diffusion equation (e.g., BAS-RBM), incorporating radial, pitch-angle and energy diffusion and...
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Oliver Allanson (University of Birmingham; University of Exeter)06/11/2025, 12:00Oral
Understanding the dynamics of energetic electron populations in the Earth's outer radiation belt presents unique opportunities to grapple with the fundamental physics of relativistic charged particle trapping, loss, and acceleration in our own 'back-yard'.
On the one hand our understanding of radiation belt dynamics has evolved a great deal in the 60+ years since their discovery. However...
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Karen Júlia Coldebella Ferreira (National Institute for Space Research (INPE)), Ligia Alves da Silva (National Institute for Space Research), Livia Alves (INPE - National Institute for Space Research), vinicius deggeroni (INPE)06/11/2025, 14:45Oral
This study investigates chorus wave activity and relativistic electron dynamics in the radiation belts during the High-Speed Stream (HSS) event that occurred between October 12 and 16, 2016. Electron flux measurements from the REPT instrument and magnetic field data from EMFISIS aboard the Van Allen Probes were analyzed, along with solar wind and interplanetary magnetic field (IMF) parameters...
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Ondřej Santolík06/11/2025, 15:00Oral
We describe a large database of natural electromagnetic emissions of lower band whistler mode chorus and exohiss within the Earth's magnetosphere. It is based on more than 50 milion selected survey measurements of the magnetic fluctuations, recorded between 2001 and 2020 by the two NASA Van Allen Probes and four ESA Cluster spacecraft. The database provides a comprehensive view of amplitudes...
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Alwin Roy (GFZ Helmholtz Centre for Geosciences)06/11/2025, 15:15Oral
Chorus waves play a significant role in the dynamic evolution of energetic electrons in the inner magnetosphere. Thus, understanding the spatial and temporal dynamics of these electrons requires global distributions of chorus waves, which are not usually possible to obtain from a single satellite mission. In this study, we use 11 years of data from both the Van Allen Probes mission and the...
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Gislayne Medeiros da Nóbrega (National Institute for Space Research - INPE)06/11/2025, 15:30Oral
Whistler-mode waves are commonly observed in magnetized plasma environments, such as Earth’s inner magnetosphere, where wave-particle interactions play a significant role in radiation belt electron dynamics during geomagnetically active periods. Several mechanisms have been proposed for the generation of whistler-mode waves within the dense plasmasphere and plasmaspheric plumes, including...
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173. Spectral Splitting of Long-Lasting Whistler Echo Trains Propagating in a Dual Ducting StructureIvana Kolmasova (Institute of Atmospheric Physics of the Czech Academy of Sciences, Prague, Czechia)06/11/2025, 15:45Oral
We report an observation of long-lasting echo trains of lightning-generated whistlers recorded by the WBD instruments on the Cluster spacecraft near the plasmapause on 23 April 2002 during an interval of quasiperiodic emissions. The whistler traces exhibit spectral discontinuities, which split each of them into two branches around 3.6 kHz, with lower-frequency components being stronger and...
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Frances Staples (University of California Los Angeles)07/11/2025, 08:30Oral
The Radiation Belt Forecasting Model and Framework (RBFMF) provides real-time forecasts and hindcasts of the radiation environment, which are used as inputs for the Satellite Charging Assessment Tool (Sat-CAT). Sat-Cat is used by satellite operators to model both long term and real-time effects of internal charging on satellite components. We will present the validation results of the RBFMF,...
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Nour Dahmen (DPHY, ONERA, Université de Toulouse, France)07/11/2025, 09:00Oral
Given the critical impact of accurate radiation belt modeling on space radiation environment restitution and forecasting, data assimilation has been employed to enhance physical models estimations since their earliest days. The method, allows the correction of the theoretical description of a given model, thanks to the ingestion of in-situ observations. Precisely, the widely adopted approach...
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Yuri Shprits (GFZ)07/11/2025, 09:15Oral
In previous years, space weather predictions have been developed as part of the Horizon 2020 funded projects PROGRESS (PRediction of Geospace Radiation Environment and Solar wind parameterS) and PAGER (Prediction of Adverse effects of Geomagnetic Storms and Energetic Radiation). Space weather predictions were initiated from observations of the Sun and provide a forecast of the radiation in...
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Dylan Weston (Northumbria University)Oral
The Van Allen Radiation belts are highly dynamic in both strength and location, meaning that the belts are difficult to predict for spacecraft operators. Forecasting models exist, in part, to minimise any additional damage caused by this natural hazard. Both physics-based and machine learning models already exist; physics-based models allow for a deeper understanding of the system, and...
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Oliver Allanson (University of Birmingham; University of Exeter)Poster
Quasilinear diffusion coefficients can be used to characterise the statistical response of charged particles to perturbations by plasma waves, via resonant wave-particle interactions. The calculation of these coefficients is sufficiently complicated and arduous to render it prohibitive to many potential users, because of the expense in time spent developing the code. We present and describe...
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Edu Pacheco Rockenbach (National Institute for Space Research (INPE))Poster
The Earth’s magnetosphere evolves dynamically under the influence of solar activity. The solar wind is a persistent stream of plasma carrying the interplanetary magnetic field and continuously interacts with the magnetosphere, governing its structure and behavior. Transient solar phenomena, such as Coronal Mass Ejections (CMEs) and High-Speed Solar Wind Streams (HSSs), further modulate this...
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Pedro Henrique Ferreira FisterPoster
The Earth’s inner magnetosphere can exhibit significant variability in the plasma density, which directly influences wave propagation in this environment. These waves play a central role in the dynamics of the relativistic and ultra-relativistic radiation belts' electron flux. Changes in plasma density, such as those occurring in the plasmasphere region, impact the group velocity of waves and,...
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Melanie Heil (ESA)Poster
ESA is implementing an enhanced Space Weather monitoring system consisting of missions to the solar wind for forecasting space weather events and the Distributed Space Weather Sensor System (D3S) to monitor the state of the Earth environment and space weather effects. D3S is built as a system of systems utilizing hosted payload opportunities as well as a range of dedicated missions addressing...
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Nadja Reisinger (KU Leuven)Poster
Magnetic reconnection is a fundamental plasma process that explosively releases energy and accelerates particles to high energies. Common in space plasmas, it also occurs in Earth’s magnetotail, the nightside of Earth's magnetosphere, where it drives particle acceleration, influences plasma dynamics in the near-Earth space environment, and plays a crucial role in space weather.
We present...
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Vincent Maget (ONERA)Poster
The Horizon Europe FARBES (Forecast of Actionable Radiation Belt Scenarios) project aims to develop methods for forecasting the dynamics of radiation belts trapped electron fluxes in an operational context. Our goal is to predict the evolution of an event over several days from its onset, as observed through geomagnetic indices, rather than predicting the occurrence of an event in the...
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Zackary Vanche (ONERA)Poster
The Earth’s radiation belts are a complex system which dynamics spans many orders of magnitude and impacts satellites instruments and electronics. Forecasting and reanalyzing the overall state of this population is of prime importance for Space Weather and Space Climate activities.
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For years, ONERA has been developing a model of the Earth’s radiation belts dynamics based on the Fokker-Plank... -
Ligia Alves da Silva (National Institute for Space Research)Poster
The physical mechanisms shaping the electron flux patterns in the inner boundary of the Earth’s outer radiation belt under the influence of different solar wind structures are well established in the literature. These processes are closely linked to the source and seed population injections, as well as wave-particle interactions that efficiently accelerate electrons crossing L-shells. The...
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Silvia Ferro (KU Leuven)Poster
Plasma dynamics at the Earth's magnetospheric flanks are strongly influenced by the Kelvin-Helmholtz instability (KHI), which arises from velocity shear between the solar wind and magnetospheric plasma. This instability leads to the formation of vortices that drive a variety of plasma phenomena, including plasma mixing and magnetic reconnection. Through these processes, KHI facilitates the...
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Xingzhi Lyu (GFZ German Research Center for Geosciences)Poster
Energetic particle precipitation (EPP) into the atmosphere can influence the chemical composition from the upper stratosphere to the lower thermosphere. The impact of precipitated relativistic electrons from the radiation belt on atmospheric chemistry and dynamics remain unresolved. In this study, we use the VERB-4D code to simulate radiation belt electron dynamics during geomagnetic storms,...
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Prof. János Lichtenberger (Department of Geophysics and Space Sciences, Eötvös University, Budapest)Poster
The current state of the art in relativistic electron radiation belt models for operational needs come in two flavours – a “nowcast” based on data assimilation of relevant and timely measurements into a physics based model, and limited “forecasts'' based on statistical forecasts of indices or solar wind parameters that govern the dynamics in physical models. The FARBES (Forecast of Actionable...
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Simon Walker (Dublin Institute for Advanced Studies)Poster
Auroral Kilometric Radiation (AKR) is a strong Earth-based radio emission generated by the acceleration of electrons along auroral latitude magnetic field lines. AKR is closely linked to auroral ionospheric activity, with greater irradiance correlating with stronger auroral electrojets and enhanced particle precipitation. AKR provides a means to remotely sense ionosphere-magnetosphere...
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Dr Sylvie Benck (UCLouvain)Poster
The 3D Energetic Electron Spectrometer (3DEES) has been designed as a compact science-class instrument that is optimized for the measurement of angle-resolved electron spectra in the energy range 0.1 - 10 MeV in the Earth’s radiation belts. It also allows to quantify proton fluxes in the energy range 2.5 to 50 MeV.
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On 5th December 2024, a demonstrator model of the instrument (measuring... -
Karen Júlia Coldebella Ferreira (National Institute for Space Research (INPE))Poster
High-speed streams (HSSs) and interplanetary coronal mass ejections (ICMEs) are two primary solar wind structures responsible for driving geomagnetic storms. These structures originate from distinct solar sources and differ in terms of plasma composition and dynamics. One important consequence of their interaction with the Earth's magnetosphere is the generation of plasma waves, including...
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