Product: Weekly Highlights and Forecasts:Issued: 2008 Sep 16 2151 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC:
# www.swpc.noaa.gov/weekly.html
#
# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity
08 - 14 September 2008
Solar activity was very low. No flares were detected. The visible disk was spotless during most of the period. Region 1001 (N06, L = 179, class/area Bxo/020 on 11 September) emerged on 11 September, but quickly decayed to plage.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit reached high levels throughout the period.
Geomagnetic field activity was at quiet to unsettled levels during 08 - 09 September with active to minor storm periods observed at high latitudes on 08 September. Activity decreased to quiet levels at all latitudes during 10 - 13 September. Activity increased to active levels late on 14 September. ACE solar wind measurements indicated a subsiding coronal hole high-speed stream (CH HSS) was in progress at the start of the period with a peak velocity of 603 km/sec observed
at 08/0711 UTC. Velocities gradually decreased during 08 - 14 September with a minimum velocity of 277 km/sec observed at 14/0304 UTC. A co-rotating interaction region (CIR) in advance of a recurrent CH HSS was observed during the latter half of 14 September. Solar wind changes associated with the CIR included increased velocities (peak 395 km/sec at 14/2229 UTC), increased densities (peak 18 p/cc at 14/2231 UTC), increased IMF Bt (peak 10
nT at 14/2049 UTC), and intermittent periods of southward IMF Bz (minimum -14 nT at 14/2039 UTC).
Forecast of Solar and Geomagnetic Activity
17 September - 13 October 2008
Solar activity is expected to be very low.
No proton events are expected at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach high levels during 17 - 22 September and again during 01 - 13 October.
Quiet geomagnetic conditions are expected during 17 - 29 September. Activity is expected to increase to unsettled levels on 30 September. A further increase to active to minor storm levels is expected during 01 - 02 October with major storm levels possible at high latitudes due to a recurrent coronal hole high-speed stream.
Activity is expected to decrease to unsettled levels during 03 - 05 October as the high-speed stream subsides. Quiet conditions are expected during 06 - 11 October. Activity is expected to increase to active levels on 12 October due to a recurrent coronal hole high-speed stream. Activity is expected to decrease to mostly quiet levels during 13 October as the high-speed stream subsides.
Product: 27-day Space Weather Outlook Table 27DO.txt:Issued: 2008 Sep 16 2152 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact :
# www.swpc.noaa.gov/wwire.html
#
# 27-day Space Weather Outlook Table
# Issued 2008 Sep 16
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2008 Sep 17 67 5 2
2008 Sep 18 67 5 2
2008 Sep 19 67 5 2
2008 Sep 20 67 5 2
2008 Sep 21 67 5 2
2008 Sep 22 67 5 2
2008 Sep 23 67 5 2
2008 Sep 24 67 5 2
2008 Sep 25 67 5 2
2008 Sep 26 67 5 2
2008 Sep 27 67 5 2
2008 Sep 28 67 5 2
2008 Sep 29 67 5 2
2008 Sep 30 67 8 3
2008 Oct 01 67 30 5
2008 Oct 02 67 8 3
2008 Oct 03 67 8 3
2008 Oct 04 67 8 3
2008 Oct 05 67 8 3
2008 Oct 06 67 5 2
2008 Oct 07 67 5 2
2008 Oct 08 67 5 2
2008 Oct 09 67 5 2
2008 Oct 10 67 5 2
2008 Oct 11 67 5 2
2008 Oct 12 67 15 4
2008 Oct 13 67 5 2
(NOAA)
