Weekly Highlights and Forecasts
:Product: Weekly Highlights and Forecasts :Issued: 2010 Sep 07 2251 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # http://www.swpc.noaa.gov/weekly.html # # Weekly Highlights and Forecasts # Highlights of Solar and Geomagnetic Activity 30 August - 05 September 2010 Solar activity was very low. Several B-class flares were observed during the period. The majority of the flares originated from Region 1105 (N19, L=048, class/area Dri/130 on 05 September). A filament lifted off the northwest quadrant observed on SDO AIA 193 at 04/1430Z. An associated CME was observed on SOHO Lasco C3 imagery, with an estimated speed of 368 km/s. No proton events were observed at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit was at high levels during 30 August - 02 September. Low to moderate levels occurred on 03-04 September. High levels returned late on 05 September. Geomagnetic field activity was predominantly quiet during the period. Isolated unsettled levels occurred during 02-03 September. Solar wind observations from the ACE spacecraft showed an enhanced interplanetary field (IMF) intensity (peak 9 nT at 05/2305Z), combined with intermittent periods of southward IMF BZ (maximum deflection of -8 nT at 05/2104Z), with a slight increase in velocities (peak 400 km/sec). Forecast of Solar and Geomagnetic Activity 08 September - 04 October 2010 Solar activity is expected to be predominantly very low. Low levels are possible from 23 September to the end of the period due to the return of old Region 1105 (N19, L=048). No proton events are expected at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at high levels from 08-12 September. Low to moderate levels are expected for 13-20 September. High levels are expected to return for 21-29 September. Low to moderate levels are expected for the remainder of the period. Geomagnetic field activity is expected to be predominantly quiet for 08-18 September. Quiet to unsettled levels, with isolated active periods, are expected for 19-21 September due to a recurrent CH HSS. Quiet levels should prevail for 22 September through the remainder of the forecast period.
