Product: Weekly Highlights and Forecasts:Issued: 2010 May 25 2351 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact: www.swpc.noaa.gov/weekly.html
# Weekly Highlights and Forecasts
Highlights of Solar and Geomagnetic Activity 17 - 23 May 2010
Solar activity was very low during the period. Occasional low-level B-class flares were observed during 22-23 May. Region 1072 (S15, L=315, class/area Dsi/130 on 23 May) emerged on the disk on 21 May. STEREO COR2 imagery observed a CME on 23/1809 UTC. This CME
originated from a filament channel located between N24W05 and N01W23 and was associated with a long duration B1 x-ray flare at 23/1801 UTC. A full halo CME was observed on 23 May in SOHO and STEREO imagery (observed on LASCO C2 imagery at 23/1730 UTC).
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit was at high levels on 17 May. Normal to moderate flux levels occurred during the rest of the period.
Geomagnetic field activity ranged from quiet to active levels during the period. Activity was predominantly quiet on 17 May. Activity increased to quiet to active levels during 18-21 May. Predominantly quiet levels occurred during the rest of the period. The active levels that occurred on 18 May appeared to be associated with a solar sector boundary passage. The activity levels that occurred during 19-20 May were associated with a recurrent co-rotating
interaction region followed by a coronal hole high-speed stream (CIR/CH HSS).
Forecast of Solar and Geomagnetic Activity
26 May - 21 June 2010
Solar activity is expected to be at very low to low levels.
No proton events are expected at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at normal to moderate levels during 26-29 May. Flux levels are expected to increase to high levels during 30 May - 09 June. Normal levels are expected for the remainder of the period.
Geomagnetic field activity is expected to be at quiet levels on 26 May. Activity is expected to increase to unsettled to minor storm levels during 27-30. The increased activity forecast on 27-28 May is expected due to CME activity that occurred on 23-24 May. The activity on 29-30 May is expected due to a recurrent CIR/CH HSS. Quiet to active levels are expected on 31 May, with quiet to unsettled levels on 01 June, as the effects of the CH HSS subside. Quiet levels are expected during 02-14 June. Quiet to active levels are expected during 15-16 June, as a recurrent CIR/CH HSS affects the field. Quiet levels are expected during the rest of the period.
Product: 27-day Space Weather Outlook Table 27DO.txt:Issued: 2010 May 25 2351 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact: www.swpc.noaa.gov/wwire.html
27-day Space Weather Outlook Table
# Issued 2010 May 25
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2010 May 26 76 5 2
2010 May 27 78 17 5
2010 May 28 78 15 5
2010 May 29 80 20 5
2010 May 30 80 20 5
2010 May 31 80 12 4
2010 Jun 01 82 7 3
2010 Jun 02 80 7 2
2010 Jun 03 80 5 2
2010 Jun 04 80 5 2
2010 Jun 05 78 5 2
2010 Jun 06 76 5 2
2010 Jun 07 75 5 2
2010 Jun 08 70 5 2
2010 Jun 09 70 5 2
2010 Jun 10 70 5 2
2010 Jun 11 70 5 2
2010 Jun 12 70 5 2
2010 Jun 13 70 5 2
2010 Jun 14 70 5 2
2010 Jun 15 70 5 2
2010 Jun 16 70 7 3
2010 Jun 17 70 5 2
2010 Jun 18 75 5 2
2010 Jun 19 75 5 2
2010 Jun 20 75 5 2
2010 Jun 21 75 5 2
(NOAA)