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Shift of the Magnetopause Reconnection Line to the Winter Hemisphere Under Southward IMF Conditions: Geotail and MMS ObservationsAt 02:13 UT on 18 November 2015 when the geomagnetic dipole was tilted by -27deg, the MMS spacecraft observed southward reconnection jets near the subsolar magnetopause under southward and dawnward interplanetary magnetic field conditions. Based on four-spacecraft estimations of the magnetic field direction near the separatrix and the motion and direction of the current sheet, the location of the reconnection line was estimated to be approx.1.8 R(sub E) or further northward of MMS. The Geotail spacecraft at GSM Z approx. 1.4 R(sub E) also observed southward reconnection jets at the dawnside magnetopause 30-40 min later. The estimated reconnection line location was northward of GSM Z approx.2 R(sub E). This crossing occurred when MMS observed purely southward magnetic fields in the magnetosheath. The simultaneous observations are thus consistent with the hypothesis that the dayside magnetopause reconnection line shifts from the subsolar point toward the northem (winter) hemisphere due to the effect of geomagnetic dipole tilt.
Document ID
20170003523
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Kitamura, N.
(Japan Aerospace Exploration Agency Sagamihara, Japan)
Hasegawa, H.
(Japan Aerospace Exploration Agency Sagamihara, Japan)
Saito, Y.
(Japan Aerospace Exploration Agency Sagamihara, Japan)
Shinohara, I.
(Japan Aerospace Exploration Agency Sagamihara, Japan)
Yokota, S.
(Japan Aerospace Exploration Agency Sagamihara, Japan)
Nagai, T.
(Tokyo Institute of Technology Tokyo, Japan)
Pollock, C. J.
(Denali Scientific, LLC Healy, AK, United States)
Giles, B. L.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Moore, T. E.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Dorelli, J. C.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Gershman, D. J.
(Oak Ridge Associated Universities, Inc. Washington, DC, United States)
Avanov, L. A.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Paterson, W. R.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Coffey, V. N.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Chandler, M. O.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Sauvaud, J. A.
(Institut de Recherche en Astrophysique et Planetologie (UMR) Toulouse, France)
Lavraud, B.
(Institut de Recherche en Astrophysique et Planetologie (UMR) Toulouse, France)
Torbert, R. B.
(New Hampshire Univ. Durham, NH, United States)
Russell, C. T.
(California State Univ. Los Angeles, CA, United States)
Strangeway, R. J.
(California State Univ. Los Angeles, CA, United States)
Burch, J. L.
(Southwest Research Inst. San Antonio, TX, United States)
Date Acquired
April 17, 2017
Publication Date
June 6, 2016
Publication Information
Publication: Geophysical Research Letters
Publisher: American Geophysical Union
Volume: 43
Issue: 11
ISSN: 0094-8276
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN41266
Distribution Limits
Public
Copyright
Other

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