:Product: Weekly Highlights and Forecasts
:Issued: 2017 Aug 07 0315 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 31 July - 06 August 2017
Solar activity was mostly at very low
levels with low levels
observed on 01 August due to an isolated C1 flare
observed at
01/0747 UTC. Region 2670 (S05, L=119, class/area Cso/160 on 02
Aug)
rotated around the east limb on 02 Aug. This region was the return
of
old Region 2665 which was responsible for two M-class flares as
well as a
fast halo CME on the far side of the Sun. However, during
its return on the
visible disk, the region has been relatively quiet
and stable, only managing
to produce B-class flares with the
exception of the aforementioned C1 flare
that occurred as it was
rounding the eastern limb. No Earth-directed coronal
mass ejections
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
moderate levels on 04 Aug and high levels from 31
Jul-03 Aug and
again from 05-06 Aug. The largest flux of the period was 8,649
pfu
observed at 06/1715 UTC.
Geomagnetic field activity ranged from
quiet to active levels over
the period. The period began at nominal levels
with solar wind
speeds near 340 km/s and total field around 4 nT. A solar
sector
boundary crossing from a positive sector to a negative sector
was
observed around midday on 01 Aug along with an increase in total
field
to near 10 nT and an increase in solar wind speed to near 450
km/s. A general
decrease in total field and solar wind speed to
nominal levels was observed
on 02 Aug. The geomagnetic field
responded with quiet conditions on 31 Jul
and 02 Aug with an
isolated unsettled period on 01 Aug. At approximately
03/1000 UTC,
an increase in total field was observed to 20 nT followed by
an
increase in solar wind speed to near 750 km/s as a
corotating
interaction region preceded an positive polarity coronal hole
high
speed stream (CH HSS). Phi angle rotated into a mostly
positive
orientation around 04/0220 UTC and remained positive through
the
rest of the period. Solar wind speed began a slow decline late on
05
Aug after having reached a maximum of 794 km/s at 05/1216 UTC. Quiet
to
active levels were observed on 03 Aug and 05-06 Aug with
unsettled to active
levels on 04 Aug.
FORECAST OF SOLAR AND GEOMAGNETIC ACTIVITY 7 AUGUST -
2 SEPTEMBER 2017
Solar activity is expected to be at very low levels
throughout the
forecast period.
No proton events are expected at
geosynchronous orbit.
The greater than 2 MeV electron flux at
geosynchronous orbit is
expected to reach moderate levels on 08, 17, and 31
Aug while high
levels are expected on 07, 09-16, 18-30 Aug and from 01-02 Sep
due
to CH HSS influence.
Geomagnetic field activity is expected to be
unsettled to active
levels from 07-09 Aug, 17-22 Aug, and 30 Aug-02 Sep with
G1 (Minor)
geomagnetic storm levels likely on 18, 31 Aug and again on 01
Sep
due to recurrent CH HSS activity.
:Product: 27-day Space Weather
Outlook Table 27DO.txt
:Issued: 2017 Aug 07 0315 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
2017-08-07
#
# UTC Radio Flux Planetary Largest
#
Date 10.7 cm A Index Kp Index
2017 Aug 07 74
8 3
2017 Aug 08 74 10 4
2017 Aug 09
74 8 3
2017 Aug 10 74 5 2
2017
Aug 11 74 5 2
2017 Aug 12 74
5 2
2017 Aug 13 74 5 2
2017 Aug 14
72 5 2
2017 Aug 15 70 5 2
2017
Aug 16 70 7 3
2017 Aug 17 70
16 4
2017 Aug 18 70 18 5
2017 Aug 19
70 16 4
2017 Aug 20 70 14 4
2017
Aug 21 70 12 3
2017 Aug 22 70
10 3
2017 Aug 23 70 7 3
2017 Aug 24
70 5 2
2017 Aug 25 70 5 2
2017
Aug 26 70 5 2
2017 Aug 27 72
5 2
2017 Aug 28 74 5 2
2017 Aug 29
74 5 2
2017 Aug 30 74 12 4
2017
Aug 31 74 24 5
2017 Sep 01 74
18 5
2017 Sep 02 74 16 4
(SWPC via
DXLD)
