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We present the spectral and temporal analysis of the X-ray flash XRF011030observed with BeppoSAX. This event is characterized by a very long X-raybursting activity that lasts about 1500 s, one of the longest ever observed byBeppoSAX. In particular, a precursor and a late flare are present in the lightcurve. We connect the late X-ray flare observed at about 1300 s to theafterglow emission observed by Chandra and associate it with the onset of theafterglow emission in the framework of external shock by a long duration engineactivity. We find that the late X-ray flare and the broadband afterglow data,including optical and radio measurements, are consistent either with a fireballexpanding in a wind environment or with a jetted fireball in an ISM.Comment: Accepted for publication in Astronomy and Astrophysics, 12 pages, 2  black and white figures, 15 color figure

Long-term flaring activity of XRF 011030 observed with BeppoSAX