Articles | Volume 37, issue 2
Regular paper
10 Apr 2019
Regular paper |  | 10 Apr 2019

Local time extent of magnetopause reconnection using space–ground coordination

Ying Zou, Brian M. Walsh, Yukitoshi Nishimura, Vassilis Angelopoulos, J. Michael Ruohoniemi, Kathryn A. McWilliams, and Nozomu Nishitani

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Subject: Magnetosphere & space plasma physics | Keywords: Solar wind–magnetosphere interactions
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Cited articles

Amm, O., Grocott, A., Lester, M., and Yeoman, T. K.: Local determination of ionospheric plasma convection from coherent scatter radar data using the SECS technique, J. Geophys. Res., 115, A03304,, 2010. 
Angelopoulos, V.: The THEMIS mission, Space Sci. Rev., 141, 5–34,, 2008. 
Archer, M. O. and Horbury, T. S.: Magnetosheath dynamic pressure enhancements: occurrence and typical properties, Ann. Geophys., 31, 319–331,, 2013. 
Baker, K. B., Dudeney, J. R., Greenwald, R. A., Pinnock, M., Newell, P. T., Rodger, A. S., Mattin, N., and Meng, C.-I.: HF radar signatures of the cusp and low-latitude boundary layer, J. Geophys. Res., 100, 7671–7695,, 1995. 
Short summary
Magnetopause reconnection is a process whereby the Sun explosively transfers energy to the Earth. Whether the process is spatially patchy or spatially continuous and extended has been under long debate. We use space–ground coordination to overcome the limitations of previous studies and reliably interpret spatial extent. Our result strongly indicates that both patchy and extended reconnection is possible and, interestingly, that extended reconnection grows from a localized patch via spreading.