1 / 12

Overview of Cluster Magnetic Field Measurements During Storm Interval: 0947-0951 UT

This report presents an overview of the Cluster magnetic field measurements from 0947 to 0951 UT, during which the spacecraft traversed the neutral sheet and observed key dynamics in the magnetic field components. Highlights include the repeated crossing of the neutral sheet, maintaining trace order without rotation in the Y-Z plane, and detecting flow reversals indicative of X-line activity. The report also discusses the dominance of the Y-component in CurlB and the Hall Effect observed during outer crossings, which shows ion-electron decoupling.

dorie
Download Presentation

Overview of Cluster Magnetic Field Measurements During Storm Interval: 0947-0951 UT

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ACE

  2. LANL

  3. Alaska chain

  4. Storm

  5. orbit

  6. overview

  7. 0935-0955

  8. 0947-0951 overview Selected interval: 0947 – 0951 UT • AE ~ 1000 nT; • Cluster is located at (-16.41, 8.01, 0.52) RE in GSM and repeatedly crosses the neutral sheet; • Bx traces are in agreement with s/c separation along ZGSM; • The order of traces remains the same during NS and SN crossings: no rotations in the Y-Z plane; • Bipolar variation of Bz; • Flow reversal (TE).

  9. X-line detection From 4-point magnetic field measurements: • Magnetic field components in the Cluster barycentre: 4 traversals. • CurlB components: Y-component is positive and dominates over the interval; • divB vary in the range +/–10 nT/103 km; • X-component of the magnetic field curvature dominates; • Flow and field line curvature reversal; • X-line moves tailward over Cluster.

  10. X-line CS structure • Thin slightly bifurcated CS around X-line, j~16nA/m2, ha~500 km; • Bifurcated current sheet on both outflow regions.

  11. Reconnection & Hall Effect Earth Tail • Hall effect (By) during ‘outer’ crossings shows ion – electron decoupling Runov, A. R. Nakamura, W. Baumjohann, R. A. Treumann, T. L. Zhang, M. Volwerk, Z. Vörös, A. Balogh, K.-H. Glaßmeier, B. Klecker, H. Rème, and L. Kistler, Current sheet structure near magnetic X-line observed by Cluster, Geoph. Res. Lett., 2003 Wolfgang Baumjohann, IWF Graz

  12. 0947-0951 Bxyz, Vxyz, N

More Related