Image of the corona in the TRACE Fe ix λ 171 corona (corresponding to a temperature range of 0.2–1.6 MK) overlying AR 10792 on 2005 July 30. Field of view is 230 × 230 Mm ². (a) Large- and small-scale loops of different forms show well-defined filamentary structure. Snapshot represents a long-term dynamic state of coronal structures being in constant motion and harboring numerous microflares that appear continuously in different places. (b) At some point, the corona shows a sudden increase in pre-flare activity including several moderate flares (one of them occurring around UT 05:29 is highlighted by the white box) and strong CME (marked by the white arrow). The major X1.3 flare occurs at UT 06:35, in the location marked by the white star. (c) Within a few minutes of the major flare, a huge "chaotic" conglomerate of coronal structures bifurcates into a well-organized dynamic state having the form of a multi-thread solenoid and remains in this state for many hours.