  The storm index SYM-H, the solar wind velocity v, and interplanetary magnetic
field Bz show no signatures of low-dimensional dynamics in quiet periods, but
tests for determinism in the time series indicate that SYM-H exhibits a
significant low-dimensional component during storm time, suggesting that
self-organization takes place during magnetic storms. Even though our analysis
yields no discernible change in determinism during magnetic storms for the
solar wind parameters, there are significant enhancement of the predictability
and exponents measuring persistence. Thus, magnetic storms are typically
preceded by an increase in the persistence of the solar wind dynamics, and this
increase is also present in the magnetospheric response to the solar wind.
