lunedì 19 dicembre 2016

Propagation outlook from Boulder

:Product: Weekly Highlights and Forecasts
:Issued: 2016 Dec 19 0057 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 December 2016

Solar activity was at background levels through the period.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit reached
high levels on 12-17 December and moderate levels on 18 December. A
maximum flux of 10,187 pfu was observed at 14/1610 UTC.

Geomagnetic field activity was at quiet to unsettled levels during
the period. The period began under the waning influence of a
negative polarity CH HSS with unsettled conditions early on 12
December. The remainder of the 12th through late on 17 December saw
quiet conditions. During this time, solar wind speeds slowly
decreased from about 550 km/s to near 350 km/s. Bt was less than 5
nT while the Bz component varied generally between +5 nT to -4 nT.
Phi angle was in a mostly negative orientation.

By midday on 17 December, winds speeds indicated a general increase
to about 500 km/s while Bt increased to about 10 nT and Bz showed
rotation from +6 nT to -7 nT. Phi angle rotated to a mostly positive
orientation. This increase in wind parameters signaled the arrival
of a co-rotating interaction region ahead of a weak, positive
polarity CH HSS. The geomagnetic field reacted with quiet to
unsettled levels.

FORECAST OF SOLAR AND GEOMAGNETIC ACTIVITY 19 DEC 2016 - 14 JAN 2017

Solar activity is expected to be at very low levels with a slight
chance for C-class flare activity throughout the outlook period.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is
expected to be at normal to moderate levels on 19 December and
moderate to high levels for the remainder of the outlook period (20
Dec - 14 Jan).

Geomagnetic field activity is expected to be at unsettled to active
levels on 19-25 December, 03-07 January and again on 14 January,
with minor storm (G1-Minor) conditions likely on 21-22 December and
04-05 January; all due to recurrent CH HSSs. Mostly quiet conditions
are expected for the remainder of the outlook period.

:Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2016 Dec 19 0057 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 2016-12-19
#
#   UTC      Radio Flux   Planetary   Largest
#  Date       10.7 cm      A Index    Kp Index
2016 Dec 19      73          15          4
2016 Dec 20      73          15          4
2016 Dec 21      73          25          5
2016 Dec 22      75          28          5
2016 Dec 23      75          12          4
2016 Dec 24      75          12          4
2016 Dec 25      75           8          3
2016 Dec 26      75           5          2
2016 Dec 27      75           5          2
2016 Dec 28      77           5          2
2016 Dec 29      77           5          2
2016 Dec 30      77           5          2
2016 Dec 31      77           5          2
2017 Jan 01      79           5          2
2017 Jan 02      79           8          3
2017 Jan 03      79          10          3
2017 Jan 04      77          20          5
2017 Jan 05      77          22          5
2017 Jan 06      75          16          4
2017 Jan 07      75          14          4
2017 Jan 08      75           6          3
2017 Jan 09      75           5          2
2017 Jan 10      75           5          2
2017 Jan 11      77           5          2
2017 Jan 12      77           5          2
2017 Jan 13      75           5          2
2017 Jan 14      75          10          3
(SWPC via DXLD)