martedì 8 maggio 2018

Propagation outlook from Boulder

:Product: Weekly Highlights and Forecasts
:Issued: 2018 May 07 0147 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 30 April - 06 May 2018

Solar activity was very quiet throughout the reporting period.
Region 2706 (N03, L=281, class/area Dao/130 on 22 Apr) produced the
strongest event of the past week, a B1 flare on 01/2115 UTC.
Activity on the farside of the Sun produced a halo CME signature
first observed in LASCO C2 imagery at 03/1712 UTC; however, 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 normal to moderate levels from 30 Apr to 05 May. Influence from
a negative polarity CH HSS caused an increase to high levels on 06
May with a peak flux of 11,500 pfu observed at 06/2305 UTC.

Geomagnetic field activity was mostly quiet until 05 May, when
enhancements in the solar wind from the onset of a negative polarity
CH HSS increased geomagnetic activity to G1 (Minor) storm levels. A
further increase to G2 (Moderate) geomagnetic storm levels were
observed early on 06 May. Solar wind speeds peaked at just over 700
km/s and persisted just below 700 km/s through the end of the
reporting period. Total field peaked during the CIR, with a maximum
of 17 nT observed at 05/1340 UTC. The maximum southward value of Bz
was -14 nT which was observed 05/1327 UTC.

FORECAST OF SOLAR AND GEOMAGNETIC ACTIVITY 07 MAY - 02 JUNE 2018

Solar activity is expected to remain at very low levels over the
next 27 days.

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 from 07-26 May and 02 Jun.
Normal to moderate levels are expected over 27 May - 01 Jun. All
enhancements in electron flux are attributed to the anticipation of
influence from multiple, recurrent CH HSSs.

Geomagnetic field activity is expected to range from quiet to G2
(moderate) geomagnetic storm levels. G2 (Moderate) storm levels are
likely on 17 May; G1 (Minor) storm levels are likely on 07 May and
02 Jun; active conditions are likely on 08-09 May, 18 May and 01
Jun; unsettled levels are likely on 10 May and 19 May. The remainder
of the outlook period is expected to be mostly quiet. All
enhancements to geomagnetic activity are due to multiple, recurrent
CH HSSs.

:Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2018 May 07 0147 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 2018-05-07
#
#   UTC      Radio Flux   Planetary   Largest
#  Date       10.7 cm      A Index    Kp Index
2018 May 07      68          20          5
2018 May 08      68          16          4
2018 May 09      68          12          4
2018 May 10      68           8          3
2018 May 11      68           5          2
2018 May 12      68           5          2
2018 May 13      70           5          2
2018 May 14      72           5          2
2018 May 15      72           5          2
2018 May 16      72           5          2
2018 May 17      72          42          6
2018 May 18      72          12          4
2018 May 19      72           8          3
2018 May 20      72           5          2
2018 May 21      72           5          2
2018 May 22      72           5          2
2018 May 23      72           5          2
2018 May 24      72           5          2
2018 May 25      72           5          2
2018 May 26      70           5          2
2018 May 27      68           5          2
2018 May 28      68           5          2
2018 May 29      68           5          2
2018 May 30      68           5          2
2018 May 31      68           5          2
2018 Jun 01      68          18          4
2018 Jun 02      68          25          5
(SWPC via DXLD)