Joseph Eggington
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View article: Implementing an Operational Cloud‐Based Now‐ and Forecasting System for Space Weather Ground Effects in the UK
Implementing an Operational Cloud‐Based Now‐ and Forecasting System for Space Weather Ground Effects in the UK Open
The enhanced variation of the magnetic field during severe to extreme geomagnetic storms induces a large geoelectric field in the subsurface. Grounded infrastructure can be susceptible to geomagnetically induced currents (GICs) during thes…
View article: Earth’s geomagnetic environment—progress and gaps in understanding, prediction, and impacts
Earth’s geomagnetic environment—progress and gaps in understanding, prediction, and impacts Open
Understanding of Earth's geomagnetic environment is critical to mitigating the space weather impacts caused by disruptive geoelectric fields in power lines and other conductors on Earth's surface. These impacts are the result of a chain of…
View article: Formation and identification of Kelvin-Helmholtz generated vortices at Earths magnetopause: Insight from adapting hydrodynamic techniques for MHD
Formation and identification of Kelvin-Helmholtz generated vortices at Earths magnetopause: Insight from adapting hydrodynamic techniques for MHD Open
The Kelvin-Helmholtz Instability (KHI) plays a significant role in the viscous-like mass, momentum, and energy transfer from the solar wind into the magnetosphere through both vortical and wave dynamics. To confidently study and compare th…
View article: Auroral, Ionospheric and Ground Magnetic Signatures of Magnetopause Surface Modes
Auroral, Ionospheric and Ground Magnetic Signatures of Magnetopause Surface Modes Open
Surface waves on Earth's magnetopause have a controlling effect upon global magnetospheric dynamics. Since spacecraft provide sparse in situ observation points, remote sensing these modes using ground‐based instruments in the polar regions…
View article: Resolving Multiscale Magnetospheric and Radiation Belt Dynamics using Global MHD, Test Particle and Fokker Planck Simulations
Resolving Multiscale Magnetospheric and Radiation Belt Dynamics using Global MHD, Test Particle and Fokker Planck Simulations Open
The global magnetosphere represents an intricate and multi-scale system with dynamics occurring across scales ranging from metres to miles and milli-seconds to days. This represents a formidable challenge to understand, and differing plasm…
View article: Auroral, Ionospheric and Ground Magnetic Signatures of Magnetopause Surface Modes
Auroral, Ionospheric and Ground Magnetic Signatures of Magnetopause Surface Modes Open
Surface waves on Earth’s magnetopause have a controlling effect upon global magnetospheric dynamics. Since spacecraft provide sparse in situ observation points, remote sensing these modes using ground-based instruments in the polar regions…
View article: Response timescales of the magnetotail current sheet during a geomagnetic storm: Global MHD simulations
Response timescales of the magnetotail current sheet during a geomagnetic storm: Global MHD simulations Open
The response of the Earth’s magnetotail current sheet to the external solar wind driver is highly time-dependent and asymmetric. For example, the current sheet twists in response to variations in the B y component of the interplanetary mag…
View article: Time‐Varying Magnetopause Reconnection During Sudden Commencement: Global MHD Simulations
Time‐Varying Magnetopause Reconnection During Sudden Commencement: Global MHD Simulations Open
In response to a solar wind dynamic pressure enhancement, the compression of the magnetosphere generates strong ionospheric signatures and a sharp variation in the ground magnetic field, termed sudden commencement (SC). While such compress…
View article: What are the ionospheric and ground magnetic signatures of global magnetopause surface modes?
What are the ionospheric and ground magnetic signatures of global magnetopause surface modes? Open
<p>Surface waves on Earth&#8217;s magnetopause act as an efficient mechanism of filtering, accumulating, and guiding the turbulent disturbances present in the solar wind into terrestrial space, thereby playing a key role in contr…
View article: Magnetospheric compressions, magnetopause shadowing and the last-closed-drift-shell
Magnetospheric compressions, magnetopause shadowing and the last-closed-drift-shell Open
<p>Fluxes in the outer radiation belt can vary by orders of magnitude in response to solar wind driving conditions. Magnetopause shadowing, where electron and proton drift paths intersect the magnetopause boundary, is a fundamental l…
View article: The future evolution of the auroral zones
The future evolution of the auroral zones Open
<p>The auroral zones indicate the locations on the Earth&#8217;s surface where, on average, it is most likely to spot aurorae as a consequence of increased solar activity. The shape of the auroral zones and, similarly, the geogra…
View article: Interplanetary Shock‐Induced Magnetopause Motion: Comparison Between Theory and Global Magnetohydrodynamic Simulations
Interplanetary Shock‐Induced Magnetopause Motion: Comparison Between Theory and Global Magnetohydrodynamic Simulations Open
The magnetopause marks the outer edge of the Earth's magnetosphere and a distinct boundary between solar wind and magnetospheric plasma populations. In this study, we use global magnetohydrodynamic simulations to examine the response of th…
View article: Electromagnetic induction in the icy satellites of Uranus
Electromagnetic induction in the icy satellites of Uranus Open
The discovery of subsurface oceans in the outer solar system has transformed our perspective of ice worlds and has led to consideration of their potential habitability. The detection and detailed characterisation of induced magnetic fields…
View article: Interplanetary Shock-driven Magnetopause Compressions in Gorgon Global-MHD Simulations
Interplanetary Shock-driven Magnetopause Compressions in Gorgon Global-MHD Simulations Open
<p>Fast-forward interplanetary interplanetary shocks, as occur at the forefront of interplanetary coronal mass ejections and at corotating interaction regions, can rapidly compress the magnetopause inside the drift paths of electrons…
View article: Dipole Tilt Effect on Magnetopause Reconnection and the Steady‐State Magnetosphere‐Ionosphere System: Global MHD Simulations
Dipole Tilt Effect on Magnetopause Reconnection and the Steady‐State Magnetosphere‐Ionosphere System: Global MHD Simulations Open
The Earth's dipole tilt angle changes both diurnally and seasonally and introduces numerous variabilities in the coupled magnetosphere‐ionosphere system. By altering the location and intensity of magnetic reconnection, the dipole tilt infl…
View article: Timescales of Ionospheric Field-Aligned Currents during a Geomagnetic Storm: Global Magnetospheric Simulations
Timescales of Ionospheric Field-Aligned Currents during a Geomagnetic Storm: Global Magnetospheric Simulations Open
<p>Geomagnetic storms generate a complex and highly time-dependent response in the magnetosphere-ionosphere system. Enhancement in field-aligned currents (FACs) can be very localised, and so accurately predicting the stormtime respon…