Tuesday, November 20, 2007

Weekly Propagation Forecast Bulletins


Product: Weekly Highlights and Forecasts
:Issued: 2007 Nov 20 2324 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/weekly.html
#
# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity
12 - 18 November 2007


Solar activity was very low. Only minor flare activity was observed.
New Region 974 (N13, L=201, class/area, Dao/040 on 17 November) formed on the disk on the 16th, but decayed to plage by 18 November.

No proton events were observed at geosynchronous orbit.

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

The geomagnetic field was quiet during most of the period. However, ACE solar wind measurements indicated a recurrent co-rotating interaction region (CIR) and coronal hole wind stream commenced on 13 November. Interplanetary Magnetic Field changes associated with
the CIR included increased Bt (peak 15.4 nT at 13/0156 UTC) and variable Bz (range +9.3 nT to -11.8 nT). Velocities gradually increased to a peak of about 690 km/sec at 14/1051 UTC, then gradually decreased during the remainder of the period. ACE proton densities associated with the CIR increased to a peak of 23.1 p/cc at 13/0224 UTC.

Forecast of Solar and Geomagnetic Activity
21 November - 17 December 2007


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 21 November - 01 December and again on 16 December.

Activity is expected to be at unsettled to minor storm levels during 21 - 22 November as a recurrent coronal hole high-speed stream disturbs the field. Activity is expected to decrease to quiet to unsettled levels during 23 - 26 November as coronal hole effects subside. Activity is expected to decrease to mostly quiet levels for the balance of the period.

Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2007 Nov 20 2324 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/wwire.html
#
# 27-day Space Weather Outlook Table
# Issued 2007 Nov 20
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2007 Nov 21 70 20 5
2007 Nov 22 70 15 4
2007 Nov 23 69 10 3
2007 Nov 24 68 8 3
2007 Nov 25 67 15 4
2007 Nov 26 67 10 3
2007 Nov 27 67 5 2
2007 Nov 28 67 5 2
2007 Nov 29 67 5 2
2007 Nov 30 67 5 2
2007 Dec 01 67 5 2
2007 Dec 02 67 5 2
2007 Dec 03 68 5 2
2007 Dec 04 68 5 2
2007 Dec 05 69 5 2
2007 Dec 06 69 5 2
2007 Dec 07 69 5 2
2007 Dec 08 70 5 2
2007 Dec 09 70 5 2
2007 Dec 10 70 5 2
2007 Dec 11 70 10 3
2007 Dec 12 70 10 3
2007 Dec 13 70 10 3
2007 Dec 14 70 5 2
2007 Dec 15 70 5 2
2007 Dec 16 70 5 2
2007 Dec 17 70 10 3
(NOAA)