Product: Weekly Highlights and Forecasts:Issued: 2007 Dec 18 2024 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
Highlights of Solar and Geomagnetic Activity
10 - 16 December 2007
Solar activity was very low to low. Activity reached low levels during 13 - 14 and 16 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 C4/1f at 13/1003 UTC. Region 978 gradually increased in area, spot number, and magnetic complexity through 13 December (including a Beta-Gamma-Delta magnetic classification on 13 December). Region 978 gradually decayed during the rest of the period.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit reached high levels during 13 - 15 December.
The geomagnetic field was quiet to active on 10 December. Quiet to unsettled levels occurred during 11 - 12 December. Activity decreased to quiet levels for the rest of the period. ACE solar wind measurements indicated a recurrent co-rotating interaction region (CIR) occurred on 10 December. The CIR was associated with increased densities, velocities, and interplanetary magnetic field activity.
Densities increased to a peak of 19 p/cc at 10/1621 UTC. CIR-associated IMF changes included increased Bt (peak 17 nT at 10/2047 UTC) and intermittent periods of increased southward Bz
(minimum -16 nT at 10/2047 UTC). The CIR was followed by a high-speed stream. Velocities increased during 10 - 11 December, reached a peak of 686 km/sec at 11/0636Z, then gradually decreased during the remainder of the period.
Forecast of Solar and Geomagnetic Activity
19 December 2007 - 14 January 2008
Solar activity is expected to be very low to low. Isolated C-class flares are possible during 01 - 13 January.
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 19 - 31 December and 10 - 12 January.
The geomagnetic field is expected to be at unsettled to active levels during 19 - 20 December due to a recurrent coronal hole high-speed stream. Activity is expected to decrease to quiet to unsettled levels during 21 - 24 December as coronal hole effects subside.
Quiet conditions are expected during 25 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 - 14 January due to a recurrent coronal hole high-speed stream.
Product: 27-day Space Weather Outlook Table 27DO.txt:Issued: 2007 Dec 18 2024 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 18
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2007 Dec 19 70 15 4
2007 Dec 20 70 15 4
2007 Dec 21 70 12 3
2007 Dec 22 70 10 3
2007 Dec 23 70 8 3
2007 Dec 24 70 8 3
2007 Dec 25 70 5 2
2007 Dec 26 70 5 2
2007 Dec 27 70 5 2
2007 Dec 28 70 5 2
2007 Dec 29 75 5 2
2007 Dec 30 75 5 2
2007 Dec 31 75 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
(NOAA)
