lunedì 30 dicembre 2019

Propagation outlook from Boulder

:Product: Weekly Highlights and Forecasts
:Issued: 2019 Dec 30 0435 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# https://www.swpc.noaa.gov/content/subscription-services
#
#                Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity
23 - 29 December 2019

Solar activity was very low. New Region 2753 (S29, L=122, class/area
Bxo/010 on 25 Dec) developed on the visible disk on late on 23
December while Region 2754 (N25, L=191, class/area Axx/010 on 25
Dec) developed on 24 Dec. Both regions were inactive and decayed to
plage on 26 Dec. No Earth-directed CMEs were observed during the
period.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at
normal levels on 27-29 Dec and reached moderate levels on 23-26 Dec.
The maximum flux of the period was 462 pfu observed at 25/1810 UTC.

Geomagnetic field activity ranged from quiet to unsettled levels. A
slight enhancement in solar wind parameters occurred beginning late
on 25 Dec as a weak negative polarity coronal hole high speed stream
(CH HSS) became geoeffective. Total field increased to a maximum of
9 nT at 25/1920 UTC while solar wind speed reached a maximum of 415
km/s at 26/1435 UTC. The geomagnetic field responded with an
isolated unsettled period early on 26 Dec.

Forecast of Solar and Geomagnetic Activity
30 December - 25 January 2020

Solar activity is expected to continue 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 be at normal levels on 06-14 and 23-25 Jan while
moderate levels are expected on 30 Dec-05 Jan and 15-22 Jan.

Geomagnetic field activity is expected to reach unsettled levels on
30 Dec-01 Jan due to weak CH HSS activity. Unsettled to active
levels are expected on 14-15 Jan due to recurrent CH HSS activity.

:Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2019 Dec 30 0435 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# https://www.swpc.noaa.gov/content/subscription-services
#
#      27-day Space Weather Outlook Table
#                Issued 2019-12-30
#
#   UTC      Radio Flux   Planetary   Largest
#  Date       10.7 cm      A Index    Kp Index
2019 Dec 30      72           8          3
2019 Dec 31      72           8          3
2020 Jan 01      71           8          3
2020 Jan 02      71           5          2
2020 Jan 03      70           5          2
2020 Jan 04      70           5          2
2020 Jan 05      70           5          2
2020 Jan 06      70           5          2
2020 Jan 07      70           5          2
2020 Jan 08      70           5          2
2020 Jan 09      70           5          2
2020 Jan 10      70           5          2
2020 Jan 11      70           5          2
2020 Jan 12      72           5          2
2020 Jan 13      72           5          2
2020 Jan 14      72          12          4
2020 Jan 15      72          12          4
2020 Jan 16      72           5          2
2020 Jan 17      72           5          2
2020 Jan 18      72           5          2
2020 Jan 19      72           5          2
2020 Jan 20      72           5          2
2020 Jan 21      72           5          2
2020 Jan 22      72           5          2
2020 Jan 23      72           5          2
2020 Jan 24      72           5          2
2020 Jan 25      72           5          2
(SWPC via DXLD)