Stromtime signatures at the high latitudes
(Kirsti Kauristie)

Objective

To understand the average behavior of the polar cap convection and auroral currents during different phases of a magnetic storm.

Exercise outline

Find a suitable set of magnetic storms, and mark the Dst minimum as time T0 for each storm. Study periods of 12 or 48 hours before and after T0. Plot AE index during the periods. Are there more substorms during the storm main phase, and are the substorms larger then than at other times? For reference, find N cases of 12+48 hour periods with no storms, and plot the AE index for those periods also. Compare the AE index results against the IE index given by the meridional IMAGE magnetometer chain. At what times is the IE index at least as good as the AE index? Why is the IE index sometimes even better characteristic of strong disturbances?

Data


Back to exercises
Contact course assistant:
Minna Palmroth_at_fmi.fi (replace _at_ with @)
Finnish Meteorological Institute, Space Research
Erik Palmenin aukio 1, (Dynamicum)
Room 1D11a, 09-1929 4696
home page