The disturbance storm time (Dst, Kyoto Dst) index is a measure in the context of
space weather. It gives information about the strength of the
ring current around Earth caused by solar protons and electrons.
The ring current around Earth produces a magnetic field that is directly opposite Earth's magnetic field, i.e. 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.
See also
*
K-index
References
External links
* Th
Dst index homepageprovided by Kyoto University
* Dst a
* Dst as part of SWENE
Latest Alerts(on
ESA's Space Weather Portal)
{{DEFAULTSORT:Disturbance Storm Time Index
Planetary science
Radio frequency propagation
Electric and magnetic fields in matter
Solar System
Space weather
Electromagnetism