4.2  Second flare - C2.4

A GOES C2.4 event is reported, starting at 21:01 and ending at 21:09 UT. The TRACE images clearly show the flare evolution. CDS recorded Fe XIX flare emission during the fast raster centred at 21:19:37 UT, i.e. after the actual flare. The emission is located along a loop. However, it is interesting to note that during the previous raster, centred at 20:54:47, the same loop structure was visible (indeed had persisted for some time), while in the TRACE pre-flare images nothing appears.

20:49:08                            21:04:49                            21:08:23

21:10:27                            21:19:43                            21:25:27

20:50:34                            21:03:38                            21:04:38

Figure 9: Top, middle: TRACE negative images in the 171 Å filter. Bottom: TRACE images in the 1600 Å filter (negative).