Pages

Monday, February 11, 2019

Weekly Propagation Forecast Bulletins


Product: Weekly Highlights and Forecasts
:Issued: 2019 Feb 11 0402 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact www.swpc.noaa.gov/content/subscription-services
#
#                Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity 04 - 10 February 2019

Solar activity was at very low levels. There were no numbered sunspot regions. No Earth-directed CMEs were observed in available coronagraph imagery. 

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit ranged from moderate to high levels with a peak flux of 8,980 pfu observed on 04 Feb. High levels were observed on 04 Feb as a result of elevated solar wind speeds. Flux levels then ranged from moderate to high levels through 07 Feb under a mostly background solar wind regime, and remained at moderate to high levels through 10 Feb while under weak CH HSS influences. 

Geomagnetic field activity ranged from quiet to active levels. Unsettled periods were observed late in the day on 04 Feb into the first period of 05 Feb as solar wind speeds decreased from around 500 km/s to around 400 km/s under weakening effects from a negative polarity CH HSS. Unsettled conditions were again observed on 06 Feb as a result of minor solar wind enhancements. 

A SSBC on 08 Feb, and marginally elevated solar wind speeds, resulted in active levels the last period of the day. Unsettled levels were observed early on 09 Feb with the onset of an additional negative polarity CH HSS. Quiet to unsettled levels were observed on 10 Feb with ongoing CH HSS influences. 

Forecast of Solar and Geomagnetic Activity 11 February - 09 March 2019

Solar activity is expected to be predominantly at very low levels throughout the forecast period. However, low levels are possible with the return of old Region 2733 (N05, Lo=261) on 12 Feb. This region was very active while transiting the visible disk, and produced a C5 flare at 30/0611 UTC near the west limb, in addition to several other weaker B and C-class flares. 

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at moderate to high levels. High levels are expected on 11-12 Feb and 21 Feb-09 Mar. Moderate levels are expected 13-20 Feb. All elevated levels of electron flux are anticipated due to influence from multiple, recurrent CH HSSs. 

Geomagnetic field activity is expected to be mostly unsetted 11-12 Feb as a result of a recurrent, negative polarity CH HSS. G1 (Minor) geomagnetic storming can be expected with a recurrent, positive polarity CH HSS on 19-21 Feb, and also with a recurrent, negative polarity CH HSS on 27-2 Mar. Mostly quiet to unsettled conditions are anticipated with another weaker, recurrent, negative polarity CH HSS on 07-09 Mar. 

Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2019 Feb 11 0402 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact www.swpc.noaa.gov/content/subscription-services
#
#      27-day Space Weather Outlook Table
#                Issued 2019-02-11
#
#   UTC      Radio Flux   Planetary   Largest
#  Date       10.7 cm      A Index    Kp Index
2019 Feb 11      70           5          2
2019 Feb 12      71           8          3
2019 Feb 13      72           8          3
2019 Feb 14      72           5          2
2019 Feb 15      72           5          2
2019 Feb 16      72           5          2
2019 Feb 17      72           5          2
2019 Feb 18      72           5          2
2019 Feb 19      72          12          4
2019 Feb 20      72          20          5
2019 Feb 21      72          12          4
2019 Feb 22      72           8          3
2019 Feb 23      72           5          2
2019 Feb 24      72           5          2
2019 Feb 25      72           5          2
2019 Feb 26      71           5          2
2019 Feb 27      71          12          4
2019 Feb 28      71          15          5
2019 Mar 01      71          15          5
2019 Mar 02      71          10          4
2019 Mar 03      71           5          2
2019 Mar 04      71           5          2
2019 Mar 05      71           8          3
2019 Mar 06      71           5          2
2019 Mar 07      71           8          3
2019 Mar 08      71          10          4
2019 Mar 09      71           8          3
(NOAA)