Small-scale structure of electron density in the D region during onset phases of an auroral absorption substorm

Details Small-scale structure of electron density in the D region during onset phases of an auroral absorption substorm Small-scale structure of electron density in the D region during onset phases of an auroral absorption substorm

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997adspr..19..159r&link_type=abstract

Advances in Space Research, Volume 19, Issue 1, p. 159-168.

Physics

3

Scientific paper

Small-scale structure of the electron density in the D region during the preceding and onset phases of auroral absorption substorms classified as unloading processes was studied on the bases of imaging riometer measurements made at Tjornes, Iceland, and broad -beam riometer data collected in the Nordic Countries. The precipitation during the onset phase may be localized, covering only 10 km in both north-south and east-west directions. After the substorm onset ionospheric absorption was observed to pulsate with a period of 1 -12 minutes. Possibly this pulsation is related to the magnetohydrodynamic, field line resonances in the nightside magnetosphere and to the near-Earth neutral line substorm model.

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