:Product: Weekly Highlights and Forecasts
:Issued: 2015 May 25 0854 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 18 - 24 May 2015
Solar activity was at low levels from 18-23 May
with very low levels
observed on 24 May. Only low level isolated C-class
flaring was
observed during the period originating from Regions 2349
(S21,
L=002, class/area Dao/060 on 24 May), 2351 (N22, L=330,
class/area
Cso/020 on 20 May), and 2353 (N07, L=344, class/area Dao/060 on
24
May). Region 2339 (N13, L=129, class/area Fkc/900 on 08 May), which
was
very productive last period, decayed as it quietly rotated
around the NW limb
on 18 May. Region 2349 emerged on the visible
disk on 18 May, but did not
show any significant growth until 23
May. Region 2353 emerged on 21 May and
exhibited growth through the
end of the period. However, both regions only
managed 60 millionths
of coverage by the end of the period. No Earth directed
coronal mass
ejections were observed.
No proton events were observed
at geosynchronous orbit.
The greater than 2 MeV electron flux at
geosynchronous orbit was at
normal levels on 19 and 24 May, moderate levels
from 20-23 May, and
at high levels on 18 May.
Geomagnetic field
activity ranged from quiet to major storm
conditions. The period began under
the influence of a co-rotating
interaction region followed by a positive
polarity equatorial
coronal hole high speed stream (CH HSS). Total field
increased to a
maximum of 18 nT at 19/0052 UTC while the Bz component
fluctuated
between +13 nT and -15 nT late on 18 May through early on 19
May.
Solar wind increased to near 575 km/s by midday on 19 May
before
slowly returning to nominal conditions by late on 20 May.
The
geomagnetic field responded with minor to major storm conditions
late
on 18 May through early on 19 May. Quiet to unsettled levels
were observed on
20 May. A return to quiet conditions occurred on 21
May and persisted through
the end of the period.
FORECAST OF SOLAR AND GEOMAGNETIC ACTIVITY 25 MAY
- 20 JUNE 2015
Solar activity is expected to be at very low to low
levels. A chance
for moderate levels exists from 30 May through 11 Jun with
the
return of Region 2339.
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
possible from 31 May-01 Jun, 04-06 Jun, 10-12 Jun, and 16-20 Jun
due
to recurrent CH HSS effects.
Geomagnetic field activity is
expected to be at unsettled to active
levels from 28-30 May, 02-03 Jun, 07-11
Jun, and 13-15 Jun with
possible minor storm levels on 08-09 Jun due to
recurrent CH HSS
effects.
:Product: 27-day Space Weather Outlook Table
27DO.txt
:Issued: 2015 May 25 0854 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
2015-05-25
#
# UTC Radio Flux Planetary Largest
#
Date 10.7 cm A Index Kp Index
2015 May 25 100
5 2
2015 May 26 100 5 2
2015 May 27
100 5 2
2015 May 28 95 8 3
2015
May 29 90 12 4
2015 May 30 105
8 3
2015 May 31 110 5 2
2015 Jun 01
115 5 2
2015 Jun 02 120 15 4
2015
Jun 03 120 10 3
2015 Jun 04 125
5 2
2015 Jun 05 125 5 2
2015 Jun 06
120 5 2
2015 Jun 07 115 10 3
2015
Jun 08 115 25 5
2015 Jun 09 115
20 5
2015 Jun 10 115 12 4
2015 Jun 11
110 8 3
2015 Jun 12 105 5 2
2015
Jun 13 100 8 3
2015 Jun 14 100
15 4
2015 Jun 15 95 12 4
2015 Jun 16
90 5 2
2015 Jun 17 90 5 2
2015
Jun 18 95 5 2
2015 Jun 19 95
5 2
2015 Jun 20 95 5 2
(SWPC via
DXLD)
