Evidence for transient, local ion foreshocks caused by dayside magnetopause reconnection

Pfau-Kempf, Yann; Hietala, Heli; Milan, Steve E.; Juusola, Liisa; Hoilijoki, Sanni; Ganse, Urs; von Alfthan, Sebastian; Palmroth, Minna

doi:https://doi.org/10.5194/angeo-34-943-2016

Articles | Volume 34, issue 11

https://doi.org/10.5194/angeo-34-943-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/angeo-34-943-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 34, issue 11

Regular paper

|

04 Nov 2016

Regular paper |

| 04 Nov 2016

Evidence for transient, local ion foreshocks caused by dayside magnetopause reconnection

Yann Pfau-Kempf, Heli Hietala, Steve E. Milan, Liisa Juusola, Sanni Hoilijoki, Urs Ganse, Sebastian von Alfthan, and Minna Palmroth

Supplement

https://doi.org/10.5194/angeo-34-943-2016-supplement

Data sets

Vlasiator: First global hybrid-Vlasov simulations of Earth’s foreshock and magnetosheath S. von Alfthan, D. Pokhotelov, Y. Kempf, S. Hoilijoki, Honkonen, I., A. Sandroos, and M. Palmroth https://doi.org/10.1016/j.jastp.2014.08.012

IMAGE magnetometer data Finish Meteorological Institute (FMI) http://www.space.fmi.fi/image

A comprehensive high-throughput analysis of substorms observed by IMAGE magnetometer network: Years 1993–2003 examined E. I. Tanskanen https://doi.org/10.1029/2008JA013682

SuperDARN data Virginia Tech http://vt.superdarn.org

DARN/SuperDARN R. A. Greenwald, K. B. Baker, J. R. Dudeney, M. Pinnock, T. B. Jones, E. C. Thomas, J. P. Villain, J. C. Cerisier, C. Senior, C. Hanuise, R. D. Hunsucker, G. Sofko, J. Koehler, E. Nielsen, R. Pellinen, A. D. M. Walker, N. Sato, and H. Yamagishi https://doi.org/10.1007/BF00751350

Video supplement

Vlasiator hybrid-Vlasov simulation of the magnetosphere under southward IMF in the polar plane Yann Pfau-Kempf Finnish Meteorological Institute https://doi.org/10.5446/20474

Short summary

We have simulated the interaction of the solar wind – the charged particles and magnetic fields emitted by the Sun into space – with the magnetic field of the Earth. The solar wind flows supersonically and creates a shock when it encounters the obstacle formed by the geomagnetic field. We have identified a new chain of events which causes phenomena in the downstream region to eventually cause perturbations at the shock and even upstream. This is confirmed by ground and satellite observations.