Asymmetric Aurora Detected in the two Hemispheres Simultaneously

Details Asymmetric Aurora Detected in the two Hemispheres Simultaneously Asymmetric Aurora Detected in the two Hemispheres Simultaneously

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm24a..02l&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM24A-02

Physics

[2704] Magnetospheric Physics / Auroral Phenomena, [2721] Magnetospheric Physics / Field-Aligned Currents And Current Systems, [2736] Magnetospheric Physics / Magnetosphere/Ionosphere Interactions

Scientific paper

New evidence suggests that the commonly held idea that the aurora in the northern and southern hemispheres are mirror images of each other is not always true. The auroras do tend to occur at the same time in both polar regions at locations connected by geomagnetic field lines. Earlier studies have shown that these regions can be displaced tens of degrees in longitude, depending on the IMF, but the overall pattern was still similar. On 12 May 2001, IMAGE and Polar were well placed to observe the two poles simultaneously. The resulting images provide clear evidence that the auroral intensity can be completely asymmetrical. The asymmetry may be caused by inter-hemispheric currents predicted to arise from conductivity differences.

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