Pages

Thursday, November 20, 2008

Weekly Propagation Forecast Bulletins

Product: Weekly Highlights and Forecasts
:Issued: 2008 Nov 18 2251 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact : www.swpc.noaa.gov/weekly.html
#
# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity
10 - 16 November 2008

Solar activity was very low through the period. New-cycle polarity Region 1008 (N33, L = 121, class/area Dso/080 on 11 November) produced isolated low-level B-class flares on 10 and 12 November.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit increased to high levels during 10 - 15 November.

Geomagnetic field activity was at quiet levels during 10 - 15 November. Activity increased to active levels during 16/0000 - 0600 UTC, then decreased to quiet levels for the rest of the period. ACE solar wind measurements indicated the 16 November active levels were
associated with a coronal hole high-speed stream (CH HSS). The HSS began late on 15 November, reached a peak velocity of 528 km/sec at 16/1216 UTC, then gradually decreased during the rest of the period. Interplanetary magnetic field changes associated with the CH HSS
included an increase in Bt (peak 14 nT at 15/2021 UTC) and intermittent periods of southward Bz (minimum -13 nT at 15/2225 UTC).

Forecast of Solar and Geomagnetic Activity
19 November - 15 December 2008

Solar activity is expected to be at very low levels.

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 26 November - 03 December and 06 - 12 December.

Geomagnetic field activity is expected to be at quiet levels during 19 - 24 November. Activity is expected to increase to mostly unsettled levels during 25 - 26 November due to a recurrent CH HSS. Quiet levels are expected during 27 November - 03 December followed by an increase to unsettled to active levels during 04 - 06 December due to another recurrent CH HSS. Activity is expected to decrease to quiet levels during 07 - 15 December.

Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2008 Nov 18 2252 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 Nov 18
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2008 Nov 19 68 5 2
2008 Nov 20 68 5 2
2008 Nov 21 69 5 2
2008 Nov 22 69 5 2
2008 Nov 23 69 5 2
2008 Nov 24 69 5 2
2008 Nov 25 69 12 3
2008 Nov 26 69 10 3
2008 Nov 27 69 5 2
2008 Nov 28 69 5 2
2008 Nov 29 69 5 2
2008 Nov 30 69 5 2
2008 Dec 01 69 5 2
2008 Dec 02 69 5 2
2008 Dec 03 69 5 2
2008 Dec 04 68 8 3
2008 Dec 05 68 15 4
2008 Dec 06 68 10 3
2008 Dec 07 69 5 2
2008 Dec 08 70 5 2
2008 Dec 09 70 5 2
2008 Dec 10 69 5 2
2008 Dec 11 68 5 2
2008 Dec 12 68 5 2
2008 Dec 13 68 5 2
2008 Dec 14 68 5 2
2008 Dec 15 68 5 2
(NOAA)