Wednesday, November 18, 2009

Weekly Propagation Forecast Bulletins

Product: Weekly Highlights and Forecasts
:Issued: 2009 Nov 17 1851 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
09 - 15 November 2009

Solar activity was very low. No flares occurred during the summary period. Region 1030 (N25, L=046, class/area Cro/050 on 05 November) was observed to have a few spots without penumbra at the beginning of the period and rotated off the visible disk on 12 November. Old
Region 1029 (N17, L=213, class/area Eko/380 on 29 October), which rotated off the disk on 1 November, returned into view on 14 November as a spotless plage area. New Region 1031 (N30, L=257, class/area Bxo/010 on 15 November) emerged on the disk on 15 November. A small CME from the west limb was observed to enter the LASCO C2 field of view at 1254 UTC on 15 November. EUV imagery from the STEREO-A spacecraft clearly showed the source was in the vicinity of Region 1030 which was three days behind the limb at the time of the event.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at normal levels during the period.

The geomagnetic field was predominantly quiet throughout the summary period with the exception of a period of unsettled levels at high latitudes from 0600-1200 UTC on 09 November, a period of unsettled levels at some mid-latitude stations and active at high latitudes from 0900-1200 UTC on 14 November, and a period of unsettled levels at high latitudes from 1200-1800 UTC on 15 November. Solar wind observations from the ACE spacecraft showed a slow decline of solar wind velocity from about 450 km/s at the beginning of the period down to about 280 km/s by 2200 UTC on 11 November. In addition, the interplanetary magnetic field (IMF) showed a small increase between 2000 UTC on the 13th through 1840 UTC on the 15th, with peak Bt values around 8 nT and peak negative Bz values around -6 nT.

Forecast of Solar and Geomagnetic Activity
18 November - 14 December 2009

Solar activity is expected to be predominantly very low with just a slight chance for brief periods of low.

No proton events are expected at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit is
expected to be at normal levels through the period.

The geomagnetic field is expected to be mostly quiet for 18-19 November. An increase to unsettled with a chance for active periods is expected between 20-22 November due to effects from a favorably positioned coronal hole. Quiet levels are expected to prevail for the remainder of the interval from 23 November through 14 December.

Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2009 Nov 17 1851 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 2009 Nov 17
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2009 Nov 18 78 6 2
2009 Nov 19 78 7 2
2009 Nov 20 78 10 3
2009 Nov 21 76 15 3
2009 Nov 22 75 9 3
2009 Nov 23 72 6 2
2009 Nov 24 72 6 2
2009 Nov 25 72 5 2
2009 Nov 26 72 5 2
2009 Nov 27 70 5 2
2009 Nov 28 70 5 2
2009 Nov 29 70 5 2
2009 Nov 30 70 5 2
2009 Dec 01 70 5 2
2009 Dec 02 70 5 2
2009 Dec 03 70 5 2
2009 Dec 04 70 5 2
2009 Dec 05 70 5 2
2009 Dec 06 70 5 2
2009 Dec 07 70 5 2
2009 Dec 08 72 5 2
2009 Dec 09 72 5 2
2009 Dec 10 72 5 2
2009 Dec 11 75 5 2
2009 Dec 12 75 5 2
2009 Dec 13 75 5 2
2009 Dec 14 75 5 2
(NOAA)