The ionospheric response to the cme event of 6-11January 1997

Details The ionospheric response to the cme event of 6-11January 1997 The ionospheric response to the cme event of 6-11January 1997

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999jastp..61..223m&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 61, Issue 3-4, p. 223-232.

Physics

4

Scientific paper

An active aurora was observed at Eureka, Canada (88.9° N magnetic) following the arrivalat the magnetopause of the shock front resulting from the solar Coronal Mass Ejection of 6January 1997. This onset at 02:20 UT on 10 January marked the beginning of an aurora whichcontinued until at least 15:00 UT on 11 January, as viewed from both Eureka and the CANOPUSsite at Ft Smith (67.8° N magnetic). There were enhanced OI 630 nm polar F-region emissionsthroughout this period, with the IMF Bz controlling their form. When Bz was positive, there were continuous polar arcs; when Bzturned negative there were F-layer patches on open field lines. While the strong Hβ observed over Ft Smith (240 R) in addition to the extended 630 nm emissions and theirpersistence over two days suggested a red aurora of global proportions, it apparently did notextend to latitudes below 60°. There was a moderate magnetic storm associated with the aurora,but the Dst index reached only -81 nT on 10 January.

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