| 1. |
- KAURISTIE, K, et al.
(author)
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ANALYSIS OF THE SUBSTORM TRIGGER PHASE USING MULTIPLE GROUND-BASED INSTRUMENTATION
- 1995
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In: GEOPHYSICAL RESEARCH LETTERS. - : AMER GEOPHYSICAL UNION. - 0094-8276. ; 22:15, s. 2065-2068
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Journal article (other academic/artistic)abstract
- During the substorm trigger phase, i.e. during the last few minutes before the onset, the slowly and linearly developing growth phase features strengthen exponentially. Often the enhanced auroral activity fades abruptly during a couple of minutes just pri
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| 2. |
- Kauristie, K, et al.
(author)
-
Auroral precipitation fading before and at substorm onset: ionospheric and geostationary signatures
- 1997
-
In: ANNALES GEOPHYSICAE-ATMOSPHERES HYDROSPHERES AND SPACE SCIENCES. - : SPRINGER VERLAG. - 0992-7689. ; 15:8, s. 967-983
-
Journal article (other academic/artistic)abstract
- Rapid fading of auroral activity a few minutes before substorm breakup has earlier been analyzed in case-studies. Here we report on a study in which all-sky camera (ASC) and magnetic data over 3 years were examined to find breakups that were accompanied b
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| 3. |
- Kauristie, K, et al.
(author)
-
What can we tell about global auroral electrojet activity from a single meridional magnetometer chain?
- 1996
-
In: ANNALES GEOPHYSICAE-ATMOSPHERES HYDROSPHERES AND SPACE SCIENCES. - : SPRINGER VERLAG. - 0992-7689. ; 14:11, s. 1177-1185
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Journal article (other academic/artistic)abstract
- The AE indices are generally used for monitoring the level of magnetic activity in the auroral oval region. In some cases, however, the oval is either so expanded or contracted that the latitudinal coverage of the AE magnetometer chain is not adequate. Th
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| 4. |
- PELLINEN, RJ, et al.
(author)
-
THE TRIGGER PHASE OF MAGNETOSPHERIC SUBSTORMS
- 1994
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In: GEOMAGNETIZM I AERONOMIYA. - : MEZHDUNARODNAYA KNIGA. - 0016-7940. ; 34:6, s. 1-8
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Journal article (other academic/artistic)abstract
- The last few minutes of the substorm growth phase before the auroral breakup show features distinct both from the gradual growth phase development and from the rapidly evolving expansion phase. During this time the optical auroras fade, energetic particle
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