solar wind and geomagnetism: toward a standard classification of geomagnetic activity from 1868 to 2009
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2012
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Abstract
We examined solar activity with a large series of geomagnetic data from 1868
to 2009. We have revisited the geomagnetic activity classification scheme of
Legrand and Simon (1989) and improve their scheme by lowering the minimum Aa
index value for shock and recurrent activity from 40 to 20 nT. This improved
scheme allows us to clearly classify about 80% of the geomagnetic
activity in this time period instead of only 60% for the previous Legrand
and Simon classification.
| Reference Key |
zerbo2012annalessolar
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|---|---|
| Authors | ;J. L. Zerbo;J. L. Zerbo;C. Amory Mazaudier;F. Ouattara;J. D. Richardson |
| Journal | journal of food measurement and characterization |
| Year | 2012 |
| DOI |
10.5194/angeo-30-421-2012
|
| URL | |
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