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Magnetohydrodynamics
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=== Space Physics === The study of space plasmas near [[Earth]] and throughout the [[Solar System]] is known as [[space physics]]. Areas researched within space physics encompass a large number of topics, ranging from the [[ionosphere]] to [[Aurora|auroras]], Earth's [[magnetosphere]], the [[Solar wind]], and [[Coronal mass ejection|coronal mass ejections]]. MHD forms the framework for understanding how populations of plasma interact within the local geospace environment. Researchers have developed global models using MHD to simulate phenomena within Earth's magnetosphere, such as the location of Earth's [[magnetopause]]<ref>{{Cite journal |last1=Mukhopadhyay |first1=Agnit |last2=Jia |first2=Xianzhe |last3=Welling |first3=Daniel T. |last4=Liemohn |first4=Michael W. |date=2021 |title=Global Magnetohydrodynamic Simulations: Performance Quantification of Magnetopause Distances and Convection Potential Predictions |journal=Frontiers in Astronomy and Space Sciences |volume=8 |page=45 |doi=10.3389/fspas.2021.637197 |bibcode=2021FrASS...8...45M |issn=2296-987X |doi-access=free }}</ref> (the boundary between the Earth's magnetic field and the solar wind), the formation of the [[ring current]], [[Electrojet|auroral electrojets]],<ref>{{Cite journal |last1=Wiltberger |first1=M. |last2=Lyon |first2=J. G. |last3=Goodrich |first3=C. C. |date=2003-07-01 |title=Results from the Lyon–Fedder–Mobarry global magnetospheric model for the electrojet challenge |url=https://www.sciencedirect.com/science/article/pii/S1364682603001718 |journal=Journal of Atmospheric and Solar-Terrestrial Physics |language=en |volume=65 |issue=11 |pages=1213–1222 |doi=10.1016/j.jastp.2003.08.003 |bibcode=2003JASTP..65.1213W |issn=1364-6826}}</ref> and [[Geomagnetically induced current|geomagnetically induced currents]].<ref>{{Citation |last=Welling |first=Daniel |title=Geomagnetically Induced Currents from the Sun to the Power Grid |chapter=Magnetohydrodynamic Models of B and Their Use in GIC Estimates |date=2019-09-25 |chapter-url=https://onlinelibrary.wiley.com/doi/10.1002/9781119434412.ch3 |series=Geophysical Monograph Series |pages=43–65 |editor-last=Gannon |editor-first=Jennifer L. |access-date=2023-03-10 |edition=1 |publisher=Wiley |language=en |doi=10.1002/9781119434412.ch3 |isbn=978-1-119-43434-4 |s2cid=204194812 |editor2-last=Swidinsky |editor2-first=Andrei |editor3-last=Xu |editor3-first=Zhonghua}}</ref> One prominent use of global MHD models is in [[space weather]] forecasting. [[List of solar storms|Intense solar storms]] have the potential to cause extensive damage to satellites<ref>{{Cite web |title=What is Space Weather ? - Space Weather |url=https://swe.ssa.esa.int/what-is-space-weather |access-date=2023-03-10 |website=swe.ssa.esa.int}}</ref> and infrastructure, thus it is crucial that such events are detected early. The [[Space Weather Prediction Center]] (SWPC) runs MHD models to predict the arrival and impacts of space weather events at Earth.
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