Imperial College London

Dr Jonathan P. Eastwood

Faculty of Natural SciencesDepartment of Physics

Senior Lecturer



+44 (0)20 7594 8101jonathan.eastwood Website




6M63Blackett LaboratorySouth Kensington Campus






BibTex format

author = {Nakamura, R and Genestreti, KJ and Nakamura, T and Baumjohann, W and Varsani, A and Nagai, T and Bessho, N and Burch, JL and Denton, RE and Eastwood, JP and Ergun, RE and Gershman, DJ and Giles, BL and Hasegawa, H and Hesse, M and Lindqvist, P-A and Russell, CT and Stawarz, JE and Strangeway, RJ and Torbert, RB},
doi = {10.1029/2018ja026028},
journal = {Journal of Geophysical Research: Space Physics},
pages = {1173--1186},
title = {Structure of the current sheet in the 11 July 2017 Electron Diffusion Region Event},
url = {},
volume = {124},
year = {2019}

RIS format (EndNote, RefMan)

AB - The structure of the current sheet along the Magnetospheric Multiscale (MMS) orbit is examined during the 11 July 2017 Electron Diffusion Region (EDR) event. The location of MMS relative to the Xline is deduced and used to obtain the spatial changes in the electron parameters. The electron velocity gradient values are used to estimate the reconnection electric field sustained by nongyrotropic pressure. It is shown that the observations are consistent with theoretical expectations for an inner EDR in 2D reconnection. That is, the magnetic field gradient scale, where the electric field due to electron nongyrotropic pressure dominates, is comparable to the gyroscale of the thermal electrons at the edge of the inner EDR. Our approximation of the MMS observations using a steady state, quasi2D, tailward retreating Xline was valid only for about 1.4 s. This suggests that the inner EDR is localized; that is, electron outflow jet braking takes place within an ion inertia scale from the Xline. The existence of multiple events or current sheet processes outside the EDR may play an important role in the geometry of reconnection in the nearEarth magnetotail.
AU - Nakamura,R
AU - Genestreti,KJ
AU - Nakamura,T
AU - Baumjohann,W
AU - Varsani,A
AU - Nagai,T
AU - Bessho,N
AU - Burch,JL
AU - Denton,RE
AU - Eastwood,JP
AU - Ergun,RE
AU - Gershman,DJ
AU - Giles,BL
AU - Hasegawa,H
AU - Hesse,M
AU - Lindqvist,P-A
AU - Russell,CT
AU - Stawarz,JE
AU - Strangeway,RJ
AU - Torbert,RB
DO - 10.1029/2018ja026028
EP - 1186
PY - 2019///
SN - 2169-9380
SP - 1173
TI - Structure of the current sheet in the 11 July 2017 Electron Diffusion Region Event
T2 - Journal of Geophysical Research: Space Physics
UR -
UR -
VL - 124
ER -