Flux Ropes Observed in Interplanetary Space

Burlaga et al. (1981), Burlaga and Klein (1982), Marubashi (1986), Burlaga (1988, 1995), and many others have shown that some passing magnetic structures in the disturbed solar wind can be approximated by a cylindrical force-free field (J x B 0), Figure 8.11. The helical structure they found can most easily be identified by characteristic changes of the north-south component of the IMF, when B, Bx, By, and Bz (or theta) are plotted as a function of time (Figure 8.12). During the passage of such...