Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 38, issue 2
Articles | Volume 38, issue 2
https://doi.org/10.5194/angeo-38-287-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-38-287-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 38, issue 2
Regular paper
 | Highlight paper
 | 
02 Mar 2020
Regular paper | Highlight paper |  | 02 Mar 2020

On the alignment of velocity and magnetic fields within magnetosheath jets

Ferdinand Plaschke, Maria Jernej, Heli Hietala, and Laura Vuorinen

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Cited articles

Amata, E., Savin, S. P., Ambrosino, D., Bogdanova, Y. V., Marcucci, M. F., Romanov, S., and Skalsky, A.: High kinetic energy density jets in the Earth's magnetosheath: A case study, Planet. Space Sci., 59, 482–494, https://doi.org/10.1016/j.pss.2010.07.021, 2011. a
Archer, M. O. and Horbury, T. S.: Magnetosheath dynamic pressure enhancements: occurrence and typical properties, Ann. Geophys., 31, 319–331, https://doi.org/10.5194/angeo-31-319-2013, 2013. a, b
Archer, M. O., Horbury, T. S., and Eastwood, J. P.: Magnetosheath pressure pulses: Generation downstream of the bow shock from solar wind discontinuities, J. Geophys. Res., 117, A05228, https://doi.org/10.1029/2011JA017468, 2012. a
Archer, M. O., Hartinger, M. D., and Horbury, T. S.: Magnetospheric “magic” frequencies as magnetopause surface eigenmodes, Geophys. Res. Lett., 40, 5003–5008, https://doi.org/10.1002/grl.50979, 2013a. a
Archer, M. O., Horbury, T. S., Eastwood, J. P., Weygand, J. M., and Yeoman, T. K.: Magnetospheric response to magnetosheath pressure pulses: A low-pass filter effect, J. Geophys. Res., 118, 5454–5466, https://doi.org/10.1002/jgra.50519, 2013b. a
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Jets of solar-wind plasma commonly hit the Earth's magnetosphere. Using data from the four Magnetospheric Multiscale (MMS) spacecraft, we show statistically that within jets the magnetic field is more aligned with the plasma flow direction than outside of these jets. Our study confirms prior simulation results, but it also shows that the average effect is moderate. The jets' magnetic field is important with respect to their impact on space weather.
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