TY - T1 - Spacecraft measurements constraining the spatial extent of a magnetopause reconnection X line SN - / UR - http://hdl.handle.net/10138/224166 T3 - A1 - Walsh, B. M.; Komar, C. M.; Pfau-Kempf, Y. A2 - PB - Y1 - 2017 LA - eng AB - Multispacecraft measurements from the Time History of Events and Macroscale Interactions during Substorms (THEMIS) mission are used to probe the spatial extent of an X line at the dayside magnetopause. A case study from 21 April 2014 is presented where two THEMIS spacecraft have a near-simultaneous encounter with the equatorial dayside magnetopause separated by 3.9 Earth radii. Both spacecraft observe similar steady inflow conditions with southward interplanetary magnetic field and a high magnet... VO - IS - SP - OP - KW - Reconnection; Magnetopause; FLUX-TRANSFER EVENTS; INTERACTION OFMAGNETIC RECONNECTION; KELVIN-HELMHOLTZ MODES; MAGNETIC RECONNECTION; DAYSIDE MAGNETOPAUSE; EARTHS MAGNETOPAUSE; SOUTHWARD IMF; LOCAL TIME; CUSP; SIMULATIONS; 114 Physical sciences N1 - PP - ER -