All Figures

$\begin{figure} \par\resizebox{8cm}{!} % {\includegraphics[clip]{Fd041_f1.eps} } \end{figure}$ Figure 1: Transient sigmoid observed in an eruptive flare on 1994 Oct. 25 (from Manoharan et al. 1996) in AR 7792, which had primarily left-handed twist (Aurass et al. 1999; van Driel-Gesztelyi et al. 2000).
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In the text

$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{Fd041_f2_v2.epsi} } \end{figure}$ Figure 2: Top and side view of current density isosurfaces for $\Phi =4.9\pi$ . Left: $\vert\vec{j}\vert=0.15~j_{\rm max}$ at t=35; unperturbed case. Right: $\vert\vec{j}\vert=0.25~j_{\rm max}$ at t=28; run with an upward initial velocity perturbation at the loop apex. $\vert x\vert\le 1.5$ , $\vert y\vert\le 3$ , $0\le z\le 3$ .
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In the text

$\begin{figure} \par\resizebox{8.8cm}{!} % {\includegraphics[clip]{Fd041_f3_cmy_ps2pdf.eps} } \end{figure}$ Figure 3: Field lines of the configuration shown in the right panels of Fig. 2. $\vert x\vert\le 0.8$ , $\vert y\vert\le 3$ , $0\le z\le 2.2$ . Loop field lines lie in the surface r=a/2 (to separate the loop clearly from the sigmoids); one of them is emphasized to indicate the left handedness of the twist. The remaining field lines pass through two symmetrical vertical stripes close to the z axis that bracket the pinched HFT. The normal component of the magnetic field in the bottom plane is shown color-coded (blue - positive, red - negative). Projections of the field lines are overlayed.
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In the text

$\begin{figure} \par\resizebox{8.8cm}{!} % {\includegraphics[angle=90,clip]{Fd041_f4.eps} } \end{figure}$ Figure 4: Top view on selected field lines and on the surfaces that they form. $\vert x\vert\le 1$ , $\vert y\vert\le 3$ . The field lines for $\alpha <0$ are identical to those plotted in Fig. 3. The bottom panel shows similarly selected field lines of the system with reversed $\alpha$ at the same time.
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In the text

$\begin{figure} \par\resizebox{8cm}{!} % {\includegraphics[clip]{Fd041_f1.eps} } \end{figure}$	Figure 1: Transient sigmoid observed in an eruptive flare on 1994 Oct. 25 (from Manoharan et al. 1996) in AR 7792, which had primarily left-handed twist (Aurass et al. 1999; van Driel-Gesztelyi et al. 2000).
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$\begin{figure} \par {\includegraphics[width=8.8cm,clip]{Fd041_f2_v2.epsi} } \end{figure}$	Figure 2: Top and side view of current density isosurfaces for $\Phi =4.9\pi$ . Left: $\vert\vec{j}\vert=0.15~j_{\rm max}$ at t=35; unperturbed case. Right: $\vert\vec{j}\vert=0.25~j_{\rm max}$ at t=28; run with an upward initial velocity perturbation at the loop apex. $\vert x\vert\le 1.5$ , $\vert y\vert\le 3$ , $0\le z\le 3$ .
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$\begin{figure} \par\resizebox{8.8cm}{!} % {\includegraphics[angle=90,clip]{Fd041_f4.eps} } \end{figure}$	Figure 4: Top view on selected field lines and on the surfaces that they form. $\vert x\vert\le 1$ , $\vert y\vert\le 3$ . The field lines for $\alpha <0$ are identical to those plotted in Fig. 3. The bottom panel shows similarly selected field lines of the system with reversed $\alpha$ at the same time.
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