Product: Weekly Highlights and Forecasts:Issued: 2008 Sep 23 2251 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact:
# http://www.swpc.noaa.gov/weekly.html
#
# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity
15 - 21 September 2008
Solar activity was very low. No flares were detected. The visible disk was spotless.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit reached high levels during 16 - 17 September.
Geomagnetic field activity ranged from quiet to active levels during 15 - 16 September with minor to major storm periods observed at high latitudes. Activity decreased to quiet to unsettled levels during 17 - 18 September, though active to major storm periods were observed at high latitudes on 18 September. Activity decreased to mostly quiet levels during 19 - 21 September. ACE solar wind data indicated a co-rotating interaction region (CIR) was in progress at the start of the period. The CIR, which preceded a recurrent coronal hole high-speed stream (HSS), commenced on 14 September and continued into 15 September. The HSS began on 15 September and reached a peak velocity of 620 km/sec at 15/1200 UTC. Velocities gradually decreased during the remainder of the period with a minimum of 295 km/sec observed at 21/2221 UTC. The proton density increase associated with the CIR reached a peak of 17 p/cc at 15/0426 UTC.
Interplanetary magnetic field (IMF) activity associated with the CIR included increased Bt (peak 14 nT at 15/0627 UTC) and intermittent periods of southward Bz (minimum -10 nT at 15/0938 UTC). Bz settled into a range of + 5 to -5 nT following the CIR. Bt varied from 01 -
07 nT following the CIR.
Forecast of Solar and Geomagnetic Activity
24 September - 20 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 01 - 14 October.
Quiet geomagnetic conditions are expected during 24 - 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 October with a chance for major storm levels due to a recurrent coronal hole high-speed stream (HSS). Activity is expected to decrease to unsettled levels during 02 - 05 October as the HSS 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 HSS. Activity is expected to decrease to quiet levels during the remainder of the period as the HSS subsides.
Product: 27-day Space Weather Outlook Table 27DO.txt:Issued: 2008 Sep 23 2252 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact:
# http://www.swpc.noaa.gov/wwire.html
#
# 27-day Space Weather Outlook Table
# Issued 2008 Sep 23
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2008 Sep 24 70 5 2
2008 Sep 25 70 5 2
2008 Sep 26 70 5 2
2008 Sep 27 68 5 2
2008 Sep 28 68 5 2
2008 Sep 29 68 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 68 5 2
2008 Oct 11 70 5 2
2008 Oct 12 70 15 4
2008 Oct 13 70 5 2
2008 Oct 14 70 5 2
2008 Oct 15 70 5 2
2008 Oct 16 70 5 2
2008 Oct 17 70 5 2
2008 Oct 18 70 5 2
2008 Oct 19 70 5 2
2008 Oct 20 70 5 2
(NOAA)
