English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

This paper compares properties of the source region with those inferred fromsatellite observations near Earth of the magnetic cloud which reached 1 AU on 20 November 2003. We use observations from space missions SOHO and TRACE together with ground-based data to study the magnetic  structure of the active region NOAA 10501 containing a highly curved filament,  and determine the reconnection rates and fluxes in an M4 flare on 18 November 2003  which is associated with a fast halo CME. This event has been linked before to the  magnetic cloud on 20 November 2003. We model the near-Earth observations with the  Grad-Shafranov reconstruction technique using a novel approach in which we optimize  the results with two-spacecraft measurements of the solar wind plasma and magnetic field made by ACE and WIND.   The two probes were separated by hundreds of Earth radii. They pass through the axis  of the cloud which is inclined −50 degree to the ecliptic.The magnetic cloud orientation at 1 AU is consistent with anencounter with the heliospheric current sheet. We estimate that50% of its poloidal flux has been lost through reconnection ininterplanetary space. By comparing the flare ribbon flux with theoriginal cloud fluxes we infer a flux rope formation during theeruption, though uncertainties are still significant. Themulti-spacecraft Grad-Shafranov method opens new vistas in probingof the spatial structure of magnetic clouds in STEREO-WIND/ACEcoordinated studies

Two-spacecraft reconstruction of a magnetic cloud and comparison to its solar source