Hot flow anomaly remnant in the far geotail?

A hot flow anomaly (HFA) like event was observed by the Solar TErrestrial RElations Observatory (STEREO) in the night side magnetosheath in the far tail in February-March 2007. The magnetic signature of the tangential discontinuity was visible, but the resolution of the plasma ion data is not suffic...

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Bibliographic Details
Published inarXiv.org
Main Authors Facskó, Gábor, Opitz, Andrea, Lavraud, Benoit, Luhmann, Janet G, Russell, Christopher T, Jean-Andre Sauvaud, Fedorov, Andrei, Kis, Árpád, Wesztergom, Viktor
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 04.02.2015
Subjects
Magnetic signatures
Magnetosheath
Night
Physics - Space Physics
Solar wind
Solar wind velocity
Venus
Wind speed
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Summary:A hot flow anomaly (HFA) like event was observed by the Solar TErrestrial RElations Observatory (STEREO) in the night side magnetosheath in the far tail in February-March 2007. The magnetic signature of the tangential discontinuity was visible, but the resolution of the plasma ion data is not sufficient for our analysis, so a method is given to identify HFAs without solar wind velocity measurements. The event observed in the night side magnetosheath in the far tail might be the remnant of an HFA event, a not-so-active current sheet. This observation suggests that the lifetime of the HFAs might be several 10 minutes, much longer than the expected several minutes.
ISSN:2331-8422
DOI:10.48550/arxiv.1502.01290