this is a note file for science run interruption occured on 12/06/2006 The trigger level for E1300 is changed from 10 to 20, and this is the first interruption with 20. From 12/06/2006 SOT shift Report -------------------------------- Solar radiation levels rose yesterday in response to repeated flare activity from active region 930 (two X-class, one M-class and numerous C-class flares). SCS 107 ran autonomously yesterday afternoon at 2006:340:16:16Z. This trip was probably due to an E1300 combination of actual radiation and current-limit effect. RADIATION SUMMARY ---------------- Radiation levels are very high (P3 > 9000 at 341:12:00Z) and still rising steeply. Continued flare and CME activity are expected from region 930. 3-day Solar-Geophysical Forecast issued Dec 6 at 22:00 UTC Solar Activity Forecast: Solar activity is expected to be high. Region 930 is expected to produce M-class flares and there is a good chance for further X-class activity. Geophysical Activity Forecast: The geomagnetic field is expected to be unsettled to active on 07 - 08 December with a chance for periods of minor or major storm conditions due to the recurrent coronal hole high speed stream. Quiet to unsettled conditions are expected on 09 December. The greater than 10 MeV proton event is expected to continue for at least another 24 hours From 12/08/2006 SOT Shift Report --------------------------------- Solar radiation levels are extremely high (P3 ~ 65,000) but very slowly decreasing. We are not currently observing. RADIATION SUMMARY ---------------- Radiation levels are extremely high (P3 > 65,000 at 342:12:00Z) but slowly decreasing. Flare and CME activity are still possible from region 930. 3-day Solar-Geophysical Forecast issued Dec 7 at 22:00 UTC Solar Activity Forecast: Solar activity is expected to be moderate to high. Region 930 is expected to produce further M-class flares and there is a good chance for X-class activity. Geophysical Activity Forecast: The geomagnetic field is expected to range from unsettled to minor storm levels with a chance for major storm periods for the next three days (08 - 10 December). Although the magnetic cloud associated with the X9 flare and CME observed on 05 December is not expected to impact earth, a shock passage is likely; consequently, active to minor storm periods are expected on 08 December. CME activity associated with the M6 and X6 flares on 06 December is expected to cause occasional major storm periods late on 08 December and 09 December. Disturbed conditions are expected to continue through 10 December. The greater than 10 MeV proton event is expected to continue through 09 December. The greater then 100 MeV proton event appears to have peaked and, barring another injection of high energy protons, the event should end on 08 December. From 12/11/2006 SOT Shift Report -------------------------------- Radiation: - The ACE and GOES radiation levels have been continuing a slow but steady decline (but see below) since the last of large flares from region 930. That sunspot region has produced only minor C-class flares in the last 2.5 days. - In the last 6 hours there is evidence for a sharp uptick in the softest ACE proton channels including P3. The noisy signature initially looked like backscatter, but this may be real. - Current rates support a return to science. - Solar Activity Forecast: Solar activity is expected to be low with a chance for M-class activity from Region 930. - Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to active on 11 December. On 12 and 13 December, conditions are expected to be quiet to unsettled. The greater than 10 MeV proton event is expected to end in the next 24 to 48 hours.