**Table 1:** Comparison of values derived for the indicated models.
Model	Loop length	Magnetic field
Slow mode^a	$(2.5\pm 0.2)\times10^{10}~{\rm cm}$
Fast kink mode^a	$(5\pm 4)\times10^{10}~{\rm cm}$
Fast sausage mode^a	$(8...16)\times10^{10}~{\rm cm}$
Centrifugal force model^b		(105 $\pm$ 50) G
Pressure balance^c	$(2.8\pm1.7)\times10^{10}~{\rm cm}$	(75 $\pm$ 40) G
Radiative cooling^d	$2.5\times10^{10}~{\rm cm}$

^a Roberts et al. (1984).
^b Zaitsev & Stepanov (1989).
^c Shibata & Yokoyama (2002).
^d Hawley et al. (1995).

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