All Figures

	Figure 1: A TRACE image containing the analyzed coronal loop (outlined by the diamonds), which is fit assuming three loop geometries: circular loop (solid curve), fat (dotted curve) and thin (dashed curve) elliptical loops. Both footpoints of the loop are located behind the solar limb. The boxes mark the locations of two cuts shown in Fig. 2.
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In the text

	Figure 2: Time slices of TRACE intensity along a) Cut1 and b) Cut2, whose location is marked in Fig. 1, where the intensity is integrated along its narrower side of a width of 9 arcsec. In both a) and b), the background intensity has been removed in order to enhance clarity, and the black strips indicate data gaps. c) Evolution of GOES X-ray flux in two bandpasses.
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In the text

	Figure 3: Observations of the oscillating TRACE loop on 17 April 2002. a) A difference image before the event, which is produced by subtracting the image at 10:35:06 from one at 10:53:48. b)- d) Running difference images with an interval of 2 min. Black indicates where the loop was in the earlier image and white where it has moved to.
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In the text

	Figure 4: Difference images of simulated loop oscillations, with a geometry derived from the observation based on a circular loop model (see Table 1). a)- b) Horizontal oscillations. c)- d) Vertical oscillations.
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In the text