SOHO Telemetry Submode changed to Submode 5 on 2004/04/13 at 16:00 UT (SUMER began observing on 2004/04/14). SUMER campaign runs until 2004/06/17. In other words, LASCO synoptic observation plan cadence remains the same but the EIT CME watch images will be reduced to half-resolution (512x512) during that period.
00:26 UT S East Initially bright loop front develops as a 'bubble-like' CME. Some gusty outflow follows. EIT Fe XII shows the development of a barely backsided event above the SE limb starting at ~ 23:12 UT. 02:06 UT S West Wide and asymmetric loop front develops toward SW in the trail of event reported to start at 19:27 UT on previous day. It is difficult to determine the exact time of first appearance. At 03:06 UT, on the S Pole (at the apparent position of the southern leg of the asymmetric loop), an elongated loop front develops slightly toward SE. The resulting complex event has the appearance of a partial halo CME in C3 FOV. 04:50 UT N East Ragged front superposed with a loop front in the LOS. The ragged front develops faster than the loop, resulting in a complex feature with structured inner part (C2). At ~08:50 UT another ragged loop front develops above the E limb. CME signature in EIT Fe XII running difference images between 05:48 - 10:24 UT, coming out from behind the ENE limb. 16:06 UT N West Feature moving out, and a much smaller one falling down. Separation point at ~ 3 solar radii (PA ~ 314). 19:50 UT W Limb Extremely faint loop precedes a fast though very faint asymmetric loop front, which is clearly visible since 23:06 UT, already at ~ 1.5 solar radii above the C2 occulter. By the time, several small ragged fronts to S (blob-like), developing toward SW. 21:50 UT SS East Faint ragged loop front. It fades throughout C2.
06:26 UT N East 'V-shaped' feature. Difficult to give exact time of formation. Very faint ragged front to S moving slightly faster. 10:15 - 13:05 UT Temporary DSN Data Gap.