Imperial College London
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Professor Jonathan P. Eastwood

Faculty of Natural Sciences, Department of Physics

Professor of Space Physics
 
 
 
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Contact

 

jonathan.eastwood Website

 
 
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Assistant

 

Mr Luke Kratzmann +44 (0)20 7594 7770

 
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Location

 

Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Desai:2021:10.1029/2021GL092554,
author = {Desai, RT and Freeman, M and Eastwood, J and Eggington, J and Archer, M and Shprits, Y and Meredith, N and Staples, F and Ian, R and Hietala, H and Mejnertsen, L and Chittenden, J and Horne, R},
doi = {10.1029/2021GL092554},
journal = {Geophysical Research Letters},
pages = {1--11},
title = {Interplanetary shock-induced magnetopause motion: Comparison between theory and global magnetohydrodynamic simulations},
url = {http://dx.doi.org/10.1029/2021GL092554},
volume = {48},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The magnetopause marks the outer edge of the Earth’s magnetosphere and a distinct boundary between solar wind and magnetospheric plasma populations. In this letter, we use global magneto-hydrodynamic simulations to examine the response of the terrestrial magnetopause to fast-forward interplanetary shocks of various strengths and compare to theoretical predictions. The theory and simulations indicate the magnetopause response can be characterised by three distinct phases; an initial acceleration as inertial forces are overcome, a rapid compressive phase comprising the majority of the distance travelled, and large-scale damped oscillations with amplitudes of the order of an Earth radius. The two approaches agree in predicting subsolar magnetopause oscillations with frequencies2–13 mHz but the simulations notably predict larger amplitudes and weaker damping rates. This phenomenon is of high relevance to space weather forecasting and provides a possible explanation for magnetopause oscillations observed following the large interplanetary shocks of August 1972 and March 1991.
AU  - Desai,RT
AU  - Freeman,M
AU  - Eastwood,J
AU  - Eggington,J
AU  - Archer,M
AU  - Shprits,Y
AU  - Meredith,N
AU  - Staples,F
AU  - Ian,R
AU  - Hietala,H
AU  - Mejnertsen,L
AU  - Chittenden,J
AU  - Horne,R
DO  - 10.1029/2021GL092554
EP  - 11
PY  - 2021///
SN  - 0094-8276
SP  - 1
TI  - Interplanetary shock-induced magnetopause motion: Comparison between theory and global magnetohydrodynamic simulations
T2  - Geophysical Research Letters
UR  - http://dx.doi.org/10.1029/2021GL092554
UR  - https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021GL092554
UR  - http://hdl.handle.net/10044/1/89906
VL  - 48
ER  -
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