lunedì 5 giugno 2017

Propagation outlook from Boulder

:Product: Weekly Highlights and Forecasts
:Issued: 2017 Jun 05 0605 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 29 May - 04 June 2017

Solar activity was at very low levels on 29-30 May and again on 04
June. Low levels were reached from 31 May-03 June due to flare
activity from Region 2661 (N06, L=211, class/area Dao/200 on 02
June). The largest flare of the period was a C8/Sn at 02/1757 UTC.
Other activity included an approximate 28 degree filament eruption
centered near S11E19 observed lifting off in H-alpha imagery
beginning at 30/1300 UTC. An associated faint, narrow CME was
observed off the southeast limb beginning at 30/2334 UTC.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at
normal to moderate levels.

Geomagnetic field activity ranged from quiet to active levels. The
period began under the continued influence of the 23 May CME. Total
field reached a maximum of 17 nT at 29/0900 UTC followed by a
decrease to around 8 nT by 29/1600 UTC. The Bz component deflected
south to a maximum of -13 nT at 29/1230 UTC. Solar wind increased
from approximately 350 km/s at the beginning of the period to a
maximum of 561 km/s at 30/0940 UTC and slowly declined thereafter.
The geomagnetic field responded with quiet to active conditions on
29-30 May. A return to near nominal solar wind conditions followed
on 31 May-02 June. Quiet conditions were observed on 31 May and 02
June with quiet to unsettled levels observed on 01 June. At
approximately 03/0615 UTC, total field, solar wind speed, density,
and temperature began to increase due to the possible arrival of the
30 May CME combined with a positive polarity coronal hole high speed
stream (CH HSS). Total field increased to 14 nT at 03/1125 UTC while
the Bz component deflected south to -13 nT. Solar wind speed
increased to near 500 km/s at 03/1825 UTC before slowly recovering
by the end of the period. The geomagnetic field responded with quiet
to active levels on 03 June followed by quiet conditions on 04 June.

FORECAST OF SOLAR AND GEOMAGNETIC ACTIVITY 05 JUNE - 01 JULY 2017

Solar activity is expected to be at very low to low levels from
05-12 June as Region 2661 transits across the visible disk. Very low
levels are expected from 13 June-01 July.

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 with high levels likely
from 16-26 June due to recurrent CH HSS influence.

Geomagnetic field activity is expected to be mostly quiet with
unsettled to active levels expected on 14-19 June and G1 (Minor)
geomagnetic storm levels likely on 16 June due to recurrent CH HSS
effects.

:Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2017 Jun 05 0605 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 2017-06-05
#
#   UTC      Radio Flux   Planetary   Largest
#  Date       10.7 cm      A Index    Kp Index
2017 Jun 05      78           5          2
2017 Jun 06      78           5          2
2017 Jun 07      78           5          2
2017 Jun 08      78           5          2
2017 Jun 09      78           5          2
2017 Jun 10      78           5          2
2017 Jun 11      78           5          2
2017 Jun 12      80           5          2
2017 Jun 13      78           5          2
2017 Jun 14      78          10          3
2017 Jun 15      78          12          4
2017 Jun 16      78          25          5
2017 Jun 17      78          10          3
2017 Jun 18      78           8          3
2017 Jun 19      78           8          3
2017 Jun 20      78           5          2
2017 Jun 21      78           5          2
2017 Jun 22      78           5          2
2017 Jun 23      78           5          2
2017 Jun 24      78           5          2
2017 Jun 25      78           5          2
2017 Jun 26      78           5          2
2017 Jun 27      80           5          2
2017 Jun 28      80           5          2
2017 Jun 29      80           5          2
2017 Jun 30      80           5          2
2017 Jul 01      80           5          2
(via DXLD)