Journal
EARTH PLANETS AND SPACE
Volume 60, Issue 7, Pages 785-790Publisher
SPRINGEROPEN
DOI: 10.1186/BF03352828
Keywords
EE-index; equatorial electrojet; counter electrojet; MAGDAS/CPMN; real-time monitoring; Dst index; space weather
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Funding
- Japan Society for the Promotion of Science (JSPS) [15253005, 19253005]
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A new index. EE-index (E Dst. EU, and EL), is proposed to monitor temporal and long-term variations of the equatorial electrojet by using g the MAGDAS/CPMN real-time data. The mean value of the H component magnetic variations observed at the nightside (LT = 18-06) MAGDAS/CPMN stations along the magnetic equatorial region is found to show variations similar to those of Dst: we defined this quantity as E Dst. The E Dst can be used as proxy of Dst for the real-time and long-time geospace monitoring. By subtracting E Dst from the H component data of each equatorial station, it is possible to extract the Equatorial Electrojet and Counter Electrojet components, which are defined as EU and EL, respectively.
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