Product: Weekly Highlights and Forecasts
:Issued: 2007 Dec 25 2054 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
17 - 23 December 2007
Solar activity was very low to low. Activity reached low levels during 17 - 18 December due to isolated C-class flares from Region 978 (S09, L = 223, class/area Dac/340 on 13 December). The largest flare was a C2/Sf at 17/0716 UTC. Region 978 departed the visible disk early on 19 December.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit reached high levels during 18 - 23 December.
The geomagnetic field was quiet to active during 17 - 20 December. Quiet to unsettled levels occurred during 21 - 23 December. ACE solar wind measurements indicated a recurrent co-rotating interaction region (CIR) occurred on 17 December. The CIR was associated with increased densities, velocities, and interplanetary magnetic field activity. Densities increased to a peak of 63 p/cc at 17/0516 UTC. CIR-associated IMF changes included increased Bt (peak
18 nT at 17/0511 UTC) and intermittent periods of increased southward Bz (minimum -18 nT at 17/0646 UTC). The CIR was followed by a high-speed stream. Velocities increased during 17 - 20 December, reached a peak of 763 km/sec at 20/2142Z, then gradually decreased during the remainder of the period.
Forecast of Solar and Geomagnetic Activity
26 December 2007 - 21 January 2008
Solar activity is expected to be very low to low. Isolated C-class flares are possible during 01 - 13 January due to the return of old Region 978.
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 - 31 December, 10 - 12 January, and 15 - 21 January.
The geomagnetic field is expected to be at quiet levels during 26 December - 06 January. Activity is expected to increase to unsettled levels during 06 - 08 January due to recurrence. Activity is expected to decrease to quiet levels during 09 - 12 January. Activity is expected to increase to unsettled to active levels during 13 - 16 January due to a recurrent coronal hole high-speed stream. Activity is expected to decrease to quiet to unsettled levels for the rest of the period as the high-speed stream subsivdes.
:Issued: 2007 Dec 25 2054 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 Dec 25
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2007 Dec 26 72 5 2
2007 Dec 27 72 5 2
2007 Dec 28 72 5 2
2007 Dec 29 72 5 2
2007 Dec 30 72 5 2
2007 Dec 31 72 5 2
2008 Jan 01 75 5 2
2008 Jan 02 80 5 2
2008 Jan 03 80 5 2
2008 Jan 04 85 5 2
2008 Jan 05 85 5 2
2008 Jan 06 85 8 3
2008 Jan 07 85 12 3
2008 Jan 08 85 10 3
2008 Jan 09 85 5 2
2008 Jan 10 85 5 2
2008 Jan 11 85 5 2
2008 Jan 12 80 5 2
2008 Jan 13 80 15 4
2008 Jan 14 75 15 4
2008 Jan 15 75 15 4
2008 Jan 16 72 15 4
2008 Jan 17 72 12 3
2008 Jan 18 72 10 3
2008 Jan 19 72 8 3
2008 Jan 20 72 8 3
2008 Jan 21 72 5 2
(NOAA)
:Issued: 2007 Dec 25 2054 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
17 - 23 December 2007
Solar activity was very low to low. Activity reached low levels during 17 - 18 December due to isolated C-class flares from Region 978 (S09, L = 223, class/area Dac/340 on 13 December). The largest flare was a C2/Sf at 17/0716 UTC. Region 978 departed the visible disk early on 19 December.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit reached high levels during 18 - 23 December.
The geomagnetic field was quiet to active during 17 - 20 December. Quiet to unsettled levels occurred during 21 - 23 December. ACE solar wind measurements indicated a recurrent co-rotating interaction region (CIR) occurred on 17 December. The CIR was associated with increased densities, velocities, and interplanetary magnetic field activity. Densities increased to a peak of 63 p/cc at 17/0516 UTC. CIR-associated IMF changes included increased Bt (peak
18 nT at 17/0511 UTC) and intermittent periods of increased southward Bz (minimum -18 nT at 17/0646 UTC). The CIR was followed by a high-speed stream. Velocities increased during 17 - 20 December, reached a peak of 763 km/sec at 20/2142Z, then gradually decreased during the remainder of the period.
Forecast of Solar and Geomagnetic Activity
26 December 2007 - 21 January 2008
Solar activity is expected to be very low to low. Isolated C-class flares are possible during 01 - 13 January due to the return of old Region 978.
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 - 31 December, 10 - 12 January, and 15 - 21 January.
The geomagnetic field is expected to be at quiet levels during 26 December - 06 January. Activity is expected to increase to unsettled levels during 06 - 08 January due to recurrence. Activity is expected to decrease to quiet levels during 09 - 12 January. Activity is expected to increase to unsettled to active levels during 13 - 16 January due to a recurrent coronal hole high-speed stream. Activity is expected to decrease to quiet to unsettled levels for the rest of the period as the high-speed stream subsivdes.
:Issued: 2007 Dec 25 2054 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 Dec 25
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2007 Dec 26 72 5 2
2007 Dec 27 72 5 2
2007 Dec 28 72 5 2
2007 Dec 29 72 5 2
2007 Dec 30 72 5 2
2007 Dec 31 72 5 2
2008 Jan 01 75 5 2
2008 Jan 02 80 5 2
2008 Jan 03 80 5 2
2008 Jan 04 85 5 2
2008 Jan 05 85 5 2
2008 Jan 06 85 8 3
2008 Jan 07 85 12 3
2008 Jan 08 85 10 3
2008 Jan 09 85 5 2
2008 Jan 10 85 5 2
2008 Jan 11 85 5 2
2008 Jan 12 80 5 2
2008 Jan 13 80 15 4
2008 Jan 14 75 15 4
2008 Jan 15 75 15 4
2008 Jan 16 72 15 4
2008 Jan 17 72 12 3
2008 Jan 18 72 10 3
2008 Jan 19 72 8 3
2008 Jan 20 72 8 3
2008 Jan 21 72 5 2
(NOAA)
