Disturbance storm time index
The disturbance storm time index, also known as the Dst index or Kyoto Dst index, is a measure of the strength of the Earth's ring current.[1]: 115 [2]
The ring current around Earth produces a magnetic field that is directly opposite Earth's magnetic field; that is, if the difference between solar electrons and protons gets higher, then Earth's magnetic field becomes weaker.
A negative Dst value means that Earth's magnetic field is weakened. This is particularly the case during solar storms.
Its units are typically measured in nT (nano-Tesla).
See also
[edit]References
[edit]- ^ Maynaud, P. N. (1980). Derivation, Meaning, and Use of Geomagnetic Indices. Geophysical Monograph Series. Vol. 22. Washington, D.C.: American Geophysical Union. Bibcode:1980GMS....22..607M. doi:10.1029/GM022. ISBN 9781118663837.
- ^ Loewe, C. A.; Prölss, G. W. (1997). "Classification and mean behavior of magnetic storms". Journal of Geophysical Research: Space Physics. 102 (A7): 14209–14213. Bibcode:1997JGR...10214209L. doi:10.1029/96JA04020.
External links
[edit]- The Dst index homepage provided by Kyoto University
- Dst at NOAA/NGDC
- Dst as part of SWENET Latest Alerts Archived 2012-02-09 at the Wayback Machine (on ESA's Space Weather Portal)
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