LASCO observed a full HALO CME in the Corona today, 2001/04/10. This event was first seen in C2 at 05:30 UT with a bright front emerging over the South Pole. The event developed to a full HALO at all position angles very quickly and into the C3 field at 05:42 UT. With only 2 points in the C2 field and averaging through C3, the plane-of-sky speed was determined at 1678 km/sec at PA 248. The large loop front was seen with a bright core following over the South Pole. This is probably related to the event. Protons levels increased and particles are seen in the white light images. EIT observed activity starting in AR9415 at [23S; 9W] on disk at 04:48 UT with the area saturating at 05:00 UT. A flare was seen with wave spanning the disk. GOES reports an X2.3 flare of AR9415 begining at 04:50 UT. This activity is most likely related to the event in Lasco. A powerful X-class solar flare erupted Tuesday morning(4/10), triggering radio blackouts and a minor radiation storm. The explosion also hurled a coronal mass ejection (CME) toward Earth. Today's CME joins another already en route to our planet. Forecasters estimate a 25% chance of severe geomagnetic activity at middle latitudes when the CMEs arrive late Wednesday or Thursday. Sky watchers should be alert for auroras after sunset on Wednesday. LASCO and EIT observed a full halo CME on 2001/04/11. The event was first observed in C2 at 13:31 UT as a thin bright front in the SW. The C2 occulting disk was surrounded by 14:06 although emission over the N and E was faint. The bright front first appeared in C3 at 14:18 with the C3 occultor surrounded by 15:18. The plane of sky speed of the fastest region of the front was measured as 750 km/s at PA 232 (W) with significant deceleration through both coronagraphs. The most probable source of the CME was an M2.3 X-ray flare in AR 9415. GOES records the flare between 12:56 and 13:49 UT with peak emission at 13:26. The flare was observed to peak in EIT at 13:25. EIT observed dimmings during the event, but no wave. Apr 11, 2001 Shift Report -------------------------- Ephin P4GM read 202 at LOS, vs a trigger level of 300. But currently the GOES-8 5-9 MeV differential flux is about 85, and since ephin P4GM is roughly 3.3 times larger we have a good chance that RADMON has or will trigger SCS 107. We'll know at the next comm at 1pm EDT this afternoon. Also, the ACE 130-214 keV proton rates are rising steeply as of 12:00GMT, through ~70,000. Considering that HETG is in, we can tolerate an average rate of ~150,00 until the comm at 10pm EDT tonight, OR an average rate of ~75,000 for the remainder of this orbit until starting CTI at 102:17:29. Attempt to get earlier comm due to high radiation levels following several CMEs during the previous couple of days. Discontinue load if RADMON has not automatically tripped. Apr 12, 2001 Shift Report ------------------------- Loads have stopped due to RADMON trigger at 101:14:51. Currently approaching perigee. New load being prepared for upload during the 103:0600 (2am EDT) pass.