An extension of the geomagnetic activity index series aa for two solar cycles (1844–1868)
- 7 December 1993
- journal article
- Published by American Geophysical Union (AGU) in Geophysical Research Letters
- Vol. 20 (23) , 2703-2706
- https://doi.org/10.1029/93gl03001
Abstract
No abstract availableKeywords
This publication has 6 references indexed in Scilit:
- Periodic variation in the geomagnetic activity: A study based on the Ap indexJournal of Geophysical Research, 1993
- Geomagnetic activity during solar cycle 9 (1844–1856)Geophysical Research Letters, 1993
- The K‐derived planetary indices: Description and availabilityReviews of Geophysics, 1991
- A two-component solar cycleSolar Physics, 1991
- On the level of skill in predicting maximum sunspot number: A comparative study of single variate and bivariate precursor techniquesSolar Physics, 1990
- Geomagnetic and solar wind cycles, 1900–1975Journal of Geophysical Research, 1982