Product: Weekly Highlights and Forecasts
:Issued: 2010 Apr 06 2121 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
#
:Issued: 2010 Apr 06 2121 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
29 March - 04 April 2010
Solar activity has been at very low levels with isolated B-class flares. The SOHO/LASCO C2 imagery observed an uncorrelated CME on 30 March off the southeast limb. The visible disk was populated with three sunspot groups during the period. Region 1057 (N15, L=324, class/area Dki/290 on 29 March) was the largest group but was in a gradual decay phase. Region 1059 (S23, L=265, class/area Hsx on 29 March) produced the largest event, a long duration B7 flare on 03/0954UTC which was associated with a halo CME. The plane-of-sky
speed for this halo CE was estimated to be about 500 km/s. Region 1060 (N24, L=176, class/area Dro/090 on 4 April) was numbered late in the period.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit was at normal levels during 29 March-1 April. Flux levels increased to moderate levels on 2 April. A further increase to high flux levels occurred on 3-4 April.
The Geomagnetic field was at quiet to unsettled levels for most of the period. Solar wind velocities rose from 345-559 km/s throughout the period. Before the rise in the solar wind speed, a solar sector boundary change was observed by the ACE spacecraft early on 31
March. Brief active periods occurred during 28 March, 1-2 April, and 4 April due to the elevated wind speeds. On 2 April, the ACE spacecraft observed a shock at 02/0635Z with wind speeds rising from 435 to 540 km/s. The Boulder magnetometer measured a sudden impulse
of 19 nT at 0/0721Z. These effects are most likely from the CME observed on 30 March off the southeast limb.
Forecast of Solar and Geomagnetic Activity
07 April - 03 May 2010
Solar activity is expected to be at very low levels with a chance for C-class events during 07-14 April. As Region 1059 and new Region 1061 (N14, L=232, class/area Dso/050 on 5 April) rotate off the visible disk, activity is expected to decrease to very low levels for the rest of the forecast period.
No proton events are expected at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at very high levels on 7-8 April, high levels on 9-11 April, moderate levels on 12-14 April, and normal levels the rest of the period. However, moderate to high flux levels are possible during 30 April- 3 May.
The Geomagnetic field is expected to be at quiet to active levels with a slight chance for minor storming on 7-8 April due the waning effects of a CME and a coronal hole high speed stream. The geomagnetic field is expected to return to quiet levels for the remainder of the interval 9 April-3 May.
Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2010 Apr 06 2121 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 Apr 06
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2010 Apr 07 85 20 4
2010 Apr 08 85 15 3
2010 Apr 09 83 7 2
2010 Apr 10 81 5 2
2010 Apr 11 80 5 2
2010 Apr 12 80 5 2
2010 Apr 13 80 5 2
2010 Apr 14 80 5 2
2010 Apr 15 80 5 2
2010 Apr 16 78 5 2
2010 Apr 17 75 5 2
2010 Apr 18 75 5 2
2010 Apr 19 75 5 2
2010 Apr 20 75 5 2
2010 Apr 21 75 5 2
2010 Apr 22 75 5 2
2010 Apr 23 78 5 2
2010 Apr 24 80 5 2
2010 Apr 25 80 5 2
2010 Apr 26 80 5 2
2010 Apr 27 80 5 2
2010 Apr 28 80 5 2
2010 Apr 29 80 5 2
2010 Apr 30 80 5 2
2010 May 01 80 5 2
2010 May 02 80 5 2
2010 May 03 80 5 2
(NOAA)
29 March - 04 April 2010
Solar activity has been at very low levels with isolated B-class flares. The SOHO/LASCO C2 imagery observed an uncorrelated CME on 30 March off the southeast limb. The visible disk was populated with three sunspot groups during the period. Region 1057 (N15, L=324, class/area Dki/290 on 29 March) was the largest group but was in a gradual decay phase. Region 1059 (S23, L=265, class/area Hsx on 29 March) produced the largest event, a long duration B7 flare on 03/0954UTC which was associated with a halo CME. The plane-of-sky
speed for this halo CE was estimated to be about 500 km/s. Region 1060 (N24, L=176, class/area Dro/090 on 4 April) was numbered late in the period.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit was at normal levels during 29 March-1 April. Flux levels increased to moderate levels on 2 April. A further increase to high flux levels occurred on 3-4 April.
The Geomagnetic field was at quiet to unsettled levels for most of the period. Solar wind velocities rose from 345-559 km/s throughout the period. Before the rise in the solar wind speed, a solar sector boundary change was observed by the ACE spacecraft early on 31
March. Brief active periods occurred during 28 March, 1-2 April, and 4 April due to the elevated wind speeds. On 2 April, the ACE spacecraft observed a shock at 02/0635Z with wind speeds rising from 435 to 540 km/s. The Boulder magnetometer measured a sudden impulse
of 19 nT at 0/0721Z. These effects are most likely from the CME observed on 30 March off the southeast limb.
Forecast of Solar and Geomagnetic Activity
07 April - 03 May 2010
Solar activity is expected to be at very low levels with a chance for C-class events during 07-14 April. As Region 1059 and new Region 1061 (N14, L=232, class/area Dso/050 on 5 April) rotate off the visible disk, activity is expected to decrease to very low levels for the rest of the forecast period.
No proton events are expected at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at very high levels on 7-8 April, high levels on 9-11 April, moderate levels on 12-14 April, and normal levels the rest of the period. However, moderate to high flux levels are possible during 30 April- 3 May.
The Geomagnetic field is expected to be at quiet to active levels with a slight chance for minor storming on 7-8 April due the waning effects of a CME and a coronal hole high speed stream. The geomagnetic field is expected to return to quiet levels for the remainder of the interval 9 April-3 May.
Product: 27-day Space Weather Outlook Table 27DO.txt:Issued: 2010 Apr 06 2121 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 Apr 06
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2010 Apr 07 85 20 4
2010 Apr 08 85 15 3
2010 Apr 09 83 7 2
2010 Apr 10 81 5 2
2010 Apr 11 80 5 2
2010 Apr 12 80 5 2
2010 Apr 13 80 5 2
2010 Apr 14 80 5 2
2010 Apr 15 80 5 2
2010 Apr 16 78 5 2
2010 Apr 17 75 5 2
2010 Apr 18 75 5 2
2010 Apr 19 75 5 2
2010 Apr 20 75 5 2
2010 Apr 21 75 5 2
2010 Apr 22 75 5 2
2010 Apr 23 78 5 2
2010 Apr 24 80 5 2
2010 Apr 25 80 5 2
2010 Apr 26 80 5 2
2010 Apr 27 80 5 2
2010 Apr 28 80 5 2
2010 Apr 29 80 5 2
2010 Apr 30 80 5 2
2010 May 01 80 5 2
2010 May 02 80 5 2
2010 May 03 80 5 2
(NOAA)