Weekly Propagation Forecast Bulletins

 

Product: Weekly Highlights and Forecasts

:Issued: 2023 Apr 10 0353 UTC

# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center

# Product description and SWPC web contact www.swpc.noaa.gov/content/subscription-services

#

#                Weekly Highlights and Forecasts

#

Highlights of Solar and Geomagnetic Activity 03 - 09 April 2023

Solar activity was at low to moderate levels. Low levels were observed on 03-05, 07, and 09 Apr while moderate levels were observed on 06 and 08 Apr. Region 3272 (S21, L=102, class/area Eai/280 on 09 Apr) was responsible for the majority of the C-class activity since its emergence on 05 Apr. The region also produced M3 and M2/1n flares at 06/0553 UTC and 08/0146 UTC, respectively. Other activity included a CME off the SW limb first observed at 07/1336 UTC that was associated with a filament eruption seen in SDO/AIA 304 imagery beginning at 07/0829 UTC centered near S27W10. Modeling indicated a miss, however, a glancing blow could not be ruled out early on 12 Apr. 

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit reached high levels throughout the period due to CH HSS influence. The maximum flux was 4,290 pfu observed at 03/1455 UTC. 

Geomagnetic field activity ranged from quiet to active levels. The period began with solar wind speed of around 528 km/s with total field near 6-7 nT under negative polarity CH HSS influence. By late on 05 Apr, solar wind speed returned to nominal levels until 09/2158 UTC when the total field showed a small increase to 8 nT. The geomagnetic field responded with quiet to active levels on 03-04 Apr, quiet to unsettled levels on 05-07 and 09 Apr, and quiet levels on 08 Apr. 

Forecast of Solar and Geomagnetic Activity 10 April - 06 May 2023

Solar activity is expected to be low with a chance for moderate levels (R1-R2, Minor-Moderate) on 10-25 Apr and again from 02-06 May due to flare potential of Region 3272 and the return of old Region 3256 (S22, L=001) on 12 Apr. Very low to low levels are expected on 26 Apr-01 May. 

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach high levels on 10-11 Apr and again on 23 Apr-06 May due to recurrent CH HSS influence. 

Geomagnetic field activity is expected to reach unsettled levels on 10-11 Apr due to CH HSS activity. Unsettled to active levels are expected on 12 Apr due to a combination of HSS influence and a possible glancing blow from the 07 Apr CME. Unsettled to active levels are expected again on 17-18 Apr, 20-22 Apr, and 26 Apr-04 May with G1 (Minor) storming likely on 20, 27, and 30 Apr due to recurrent CH HSS activity. 

Product: 27-day Space Weather Outlook Table 27DO.txt

:Issued: 2023 Apr 10 0353 UTC

# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center

# Product description and SWPC web contact www.swpc.noaa.gov/content/subscription-services

#

#      27-day Space Weather Outlook Table

#                Issued 2023-04-10

#

#   UTC      Radio Flux   Planetary   Largest

#  Date       10.7 cm      A Index    Kp Index

2023 Apr 10     140           8          3

2023 Apr 11     145          10          3

2023 Apr 12     150          14          4

2023 Apr 13     152           5          2

2023 Apr 14     155           5          2

2023 Apr 15     158           5          2

2023 Apr 16     160           5          2

2023 Apr 17     160          10          3

2023 Apr 18     160          15          4

2023 Apr 19     150           5          2

2023 Apr 20     152          20          5

2023 Apr 21     155          15          4

2023 Apr 22     155          10          3

2023 Apr 23     158           5          2

2023 Apr 24     155           5          2

2023 Apr 25     155           5          2

2023 Apr 26     152          15          4

2023 Apr 27     148          18          5

2023 Apr 28     145          15          4

2023 Apr 29     142          15          4

2023 Apr 30     140          15          5

2023 May 01     140          12          4

2023 May 02     142          10          3

2023 May 03     140           8          3

2023 May 04     135           8          3

2023 May 05     135           5          2

2023 May 06     130           5          2

(NOAA)

Weekly Propagation Forecast Bulletins

 

Product: Weekly Highlights and Forecasts

:Issued: 2021 May 31 0313 UTC

# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center

# Product description and SWPC web contact www.swpc.noaa.gov/content/subscription-services

#

#                Weekly Highlights and Forecasts

#

Highlights of Solar and Geomagnetic Activity 24 - 30 May 2021

Solar activity was at very low levels on 24-25 and 30 May while an increase to low levels occurred on 26-29 May. The majority of the flare activity was from Regions 2824 (N20, L=196, class/area Dho/250 on 27 May) and 2826 (N24, L=215, class/area Dko/280 on 27 May). 

The largest flare of the period was a C9/1f at 28/2313 UTC from Region 2824. Associated with this flare were Type II and Type IV radio sweeps along with a CME observed off the west limb in the SOHO/LASCO C2 imagery beginning at the 28/2312 UTC. WSA/ENLIL modeling of the CME showed the bulk of the plasma directed off the Sun-Earth line, however, there was potential for a glancing blow late on 01 Jun to early on 02 Jun. 

A greater than 10 MeV proton event (S1-Minor) began at 29/0300 UTC, reached a peak flux of 15 pfu at 29/0320 UTC, and ended at 29/0540 UTC associated with the aforementioned C9 flare on 28 May. 

The greater than 2 MeV electron flux at geosynchronous orbit reached high levels on 24-26 May and decreased to normal-moderate levels on 27-30 May. The largest flux of the period was 1,530 pfu being observed at 25/1825 UTC. 

Geomagnetic field activity ranged from quiet to G1 (Minor) geomagnetic storm levels. The period began with nominal solar wind conditions and quiet levels through early on 26 May. At 26/1148 UTC an impulsive increase in solar wind speed from approximately 300-350 km/s was observed with then a simultaneous increase in the total field from 3-8 nT, marking the arrival of a possible conglomeration of CMEs from 22-23 May.  

Total field continued to increase to 16 nT through early on 27 May while solar wind speed increased to 400-450 km/s. The geomagnetic field responded with unsettled to G1 (Minor) storm levels in the second half on 26 May, followed by quiet to active levels on 27 May. Solar wind speed continued between 380-490 km/s through the end of the period. Quiet conditions were once again observed on 28 May followed by quiet to unsettled levels on 29-30 May. 

Forecast of Solar and Geomagnetic Activity 31 May - 26 June 2021

Solar activity is expected to be at very low to low levels on 31 May - 11 Jun and again on 26 Jun. A slight chance for moderate (R1-Minor) flares exists on 12-25 Jun with the return of Region 2824 to the visible disk. 

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach high levels on 18-22 Jun due to coronal hole high-speed stream (CH HSS) influence. 

Geomagnetic field activity is expected to reach unsettled to active levels on 01-04 Jun due to a combination of CH HSS effects as well as the potential for a glancing blow from the 28 May CME late on 01 Jun to early on 02 Jun. Unsettled to active levels are expected again on 16-17 Jun, with G1 (Minor) storm levels likely on 16 Jun due to recurrent CH HSS effects. Unsettled levels are likely to be on 26 Jun due to a possible reoccurring solar sector boundary crossing (SSBC). 

Product: 27-day Space Weather Outlook Table 27DO.txt

:Issued: 2021 May 31 0313 UTC

# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center

# Product description and SWPC web contact www.swpc.noaa.gov/content/subscription-services

#

#      27-day Space Weather Outlook Table

#                Issued 2021-05-31

#

#   UTC      Radio Flux   Planetary   Largest

#  Date       10.7 cm      A Index    Kp Index

2021 May 31      72           5          2

2021 Jun 01      72          18          4

2021 Jun 02      72          15          4

2021 Jun 03      72           8          3

2021 Jun 04      72           8          3

2021 Jun 05      72           5          2

2021 Jun 06      72           5          2

2021 Jun 07      72           5          2

2021 Jun 08      72           5          2

2021 Jun 09      73           5          2

2021 Jun 10      75           5          2

2021 Jun 11      76           5          2

2021 Jun 12      78           5          2

2021 Jun 13      78           5          2

2021 Jun 14      78           5          2

2021 Jun 15      78           5          2

2021 Jun 16      80          20          5

2021 Jun 17      80          10          3

2021 Jun 18      80           5          2

2021 Jun 19      78           5          2

2021 Jun 20      78           5          2

2021 Jun 21      78           5          2

2021 Jun 22      78           5          2

2021 Jun 23      76           5          2

2021 Jun 24      75           5          2

2021 Jun 25      73           5          2

2021 Jun 26      72           8          3

(NOAA)

Weekly Propagation Forecast Bulletins, March 1, 2021

 

Product: Weekly Highlights and Forecasts

:Issued: 2021 Mar 01 0255 UTC

# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center

# Product description and SWPC web contact www.swpc.noaa.gov/content/subscription-services

#

#                Weekly Highlights and Forecasts

#

Highlights of Solar and Geomagnetic Activity 22 - 28 February 2021

Solar activity reached low levels with C-class flare activity. Region 2804 (N21, L=309, class/area=Dso/190 on 27 Feb) produced the only two C-class flares observed this period. The first was a C2/Sf flare observed at 27/1800 UTC and the second was a C3/Sf flare observed at 28/0646 UTC. Both C-class flares were associated with narrow CME signatures that were directed away from the Sun-Earth line. 

A CME associated with a filament eruption in the SE quadrant on 20/1200 UTC (in LASCO C2 imagery) arrived in conjunction with coronal hole/high-speed stream influences, with the effects of both features observed over 24-26 Feb. 

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was moderate on 25 Feb and high throughout the remainder of the period. 

Geomagnetic field activity was quiet on 27 Feb and quiet to unsettled on 26 and 28 Feb. Quiet to active conditions were observed on 22-26 Feb due to a combination of negative polarity CH HSS influence and the arrival of the 20 Feb CME. 

Forecast of Solar and Geomagnetic Activity-  01 March - 27 March 2021

Solar activity is expected to be very low-to-low 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 moderate on 10-19 Mar. High levels are expected on 01-09, and 20-27 Mar. 

Geomagnetic field activity is expected to reach active levels on 02,  06, 12-13, 15, and 21-22 Mar, with G1 (Minor) geomagnetic storm conditions likely on 02 and 18-19 Mar, all due to recurrent CH HSSs. Mostly quiet and quiet to unsettled conditions are expected to prevail throughout the outlook period. 

Product: 27-day Space Weather Outlook Table 27DO.txt

:Issued: 2021 Feb 22 0158 UTC

# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center

# Product description and SWPC web contact www.swpc.noaa.gov/content/subscription-services

#

#      27-day Space Weather Outlook Table

#                Issued 2021-02-22

#

#   UTC      Radio Flux   Planetary   Largest

#  Date       10.7 cm      A Index    Kp Index

2021 Feb 22      75          10          4

2021 Feb 23      75          12          4

2021 Feb 24      75          12          4

2021 Feb 25      75           8          3

2021 Feb 26      75           5          2

2021 Feb 27      75           5          2

2021 Feb 28      75           5          2

2021 Mar 01      73          18          5

2021 Mar 02      74          15          4

2021 Mar 03      74           8          3

2021 Mar 04      73           5          2

2021 Mar 05      73           5          2

2021 Mar 06      73          15          4

2021 Mar 07      74           5          2

2021 Mar 08      70           5          2

2021 Mar 09      74           5          2

2021 Mar 10      76           5          2

2021 Mar 11      72           5          2

2021 Mar 12      71          15          4

2021 Mar 13      72          10          4

2021 Mar 14      70           5          2

2021 Mar 15      71          15          4

2021 Mar 16      72           8          3

2021 Mar 17      71           5          2

2021 Mar 18      73          18          5

2021 Mar 19      76          20          5

2021 Mar 20      75          20          4

(NOAA)

Weekly Propagation Forecast Bulletins

Product: Weekly Highlights and Forecasts
:Issued: 2020 Apr 06 1059 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact www.swpc.noaa.gov/content/subscription-services
#
#                Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity 30 March - 05 April 2020

Solar activity was very low throughout the period. Region 2759 (N28, L=263, class/area Hrx/030 on the 02 Apr) formed on the disk on 31 Mar and produced a few B-class events early on 04 Apr. The region decayed to plage on 05 Apr. No Earth-directed CMEs were detected.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit reached high levels on 01-04 Apr and the moderate levels on 30-31 Mar and 04-05 Apr. A maximum flux of 1,690 pfu was observed on 02 Apr at 1750 UTC.

Geomagnetic field activity was at unsettled to active levels on 30-31 Mar due to negative polarity CH HSS influence. The remainder of the period experienced quiet to unsettled levels with an isolated and active period observed late on 03 Apr.

Forecast of Solar and Geomagnetic Activity 06 April - 02 May 2020

Solar activity is expected to be very low 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 reach high levels on the 19-22 Apr and 29-30 Apr. Normal to moderate levels are expected to prevail throughout the  remainder of the outlook period.

Geomagnetic field activity is expected to reach unsettled to active levels on 10-11 Apr, 15-19 Apr and 26-27 Apr. This is due to negative polarity CH HSS influence. Generally quiet or quiet to unsettled conditions are expected to prevail throughout the remainder of the outlook period.


Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2020 Apr 06 1059 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact www.swpc.noaa.gov/content/subscription-services
#
#      27-day Space Weather Outlook Table
#                Issued 2020-04-06
#
#   UTC      Radio Flux   Planetary   Largest
#  Date       10.7 cm      A Index    Kp Index
2020 Apr 06      70           5          2
2020 Apr 07      70           5          2
2020 Apr 08      70           5          2
2020 Apr 09      70           5          2
2020 Apr 10      70           8          3
2020 Apr 11      68           8          3
2020 Apr 12      68           5          2
2020 Apr 13      68           5          2
2020 Apr 14      68           5          2
2020 Apr 15      68          10          4
2020 Apr 16      68           8          3
2020 Apr 17      68           8          3
2020 Apr 18      68           8          3
2020 Apr 19      68           8          3
2020 Apr 20      68           5          2
2020 Apr 21      68           5          2
2020 Apr 22      68           5          2
2020 Apr 23      68           5          2
2020 Apr 24      70           5          2
2020 Apr 25      70           5          2
2020 Apr 26      70          10          4
2020 Apr 27      70          10          4
2020 Apr 28      70           5          2
2020 Apr 29      70           5          2
2020 Apr 30      70           5          2
2020 May 01      70           5          2
2020 May 02      70           5          2
(NOAA)

Weekly Propagation Forecast Bulletins

Product: Weekly Highlights and Forecasts
:Issued: 2019 Mar 04 0318 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact https://www.swpc.noaa.gov/content/subscription-services
#
#                Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity 25 February - 03 March 2019

Solar activity was very low through the summary period. There were no numbered spot regions. 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 was at normal to high levels. High levels were observed on 28 Feb - 03 Mar. A peak flux of 45,516 pfu was observed at 03/1950 UTC. The remaining days of the summary period were at normal background levels.Geomagnetic field activity ranged from quiet to G1 (Minor) geomagnetic storm levels. Solar wind enhancements from the onset of influence from a negative polarity CH HSS increased geomagnetic levels from unsettled to active conditions after midday on 27 Feb.

Isolated periods of G1 (Minor) geomagnetic storm levels were observed on 28 Feb - 01 Mar as wind speeds continued to increase, reaching a peak of 608 km/s on 01/0340 UTC. An isolated period of active conditions was followed by quiet to unsettled levels for the remainder of 02-03 Mar as the CH HSS slowly waned. The remaining days of the summary period were at quiet levels under nominal solar wind conditions.

Forecast of Solar and Geomagnetic Activity 04 March - 30 March 2019

Solar activity is expected to be very low throughout the forecast period. No notable regions are due to return to the visible disk.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is expected to range from normal background to very high levels. Very high levels are likely on 04-05 Mar and 29-30 Mar; high levels are likely on 06-13 Mar and 29-28 Mar; moderate levels are likely on 14-19 Mar; normal background levels are likely on 20-26 Mar. All enhancements in electron flux are anticipated in response to multiple, recurrent CH HSSs. Geomagnetic field activity is expected to range from quiet to G1 (Minor) geomagnetic storm levels. G1 (Minor) levels are likely on 27-28 Mar; active levels are likely on 08-10 Mar, 26 Mar and 29 Mar; unsettled levels are likely on 04-05 Mar, 07 Mar, 11 Mar, 20 Mar and 30 Mar. Increases in geomagnetic field activity are anticipated due to the likely influence of multiple, recurrent CH HSSs. The remainder of the outlook period is expected to be at quiet levels.

Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2019 Mar 04 0318 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact https://www.swpc.noaa.gov/content/subscription-services
#
#      27-day Space Weather Outlook Table
#                Issued 2019-03-04
#
#   UTC      Radio Flux   Planetary   Largest
#  Date       10.7 cm      A Index    Kp Index
2019 Mar 04      70          10          3
2019 Mar 05      70           8          3
2019 Mar 06      70           5          2
2019 Mar 07      70          10          3
2019 Mar 08      70          15          4
2019 Mar 09      70          12          4
2019 Mar 10      70          12          4
2019 Mar 11      70           8          3
2019 Mar 12      70           5          2
2019 Mar 13      70           5          2
2019 Mar 14      70           5          2
2019 Mar 15      70           5          2
2019 Mar 16      70           5          2
2019 Mar 17      70           5          2
2019 Mar 18      70           5          2
2019 Mar 19      70           5          2
2019 Mar 20      70          10          3
2019 Mar 21      70           5          2
2019 Mar 22      70           5          2
2019 Mar 23      70           5          2
2019 Mar 24      70           5          2
2019 Mar 25      70           5          2
2019 Mar 26      70          12          4
2019 Mar 27      70          30          5
2019 Mar 28      70          28          5
2019 Mar 29      70          14          4
2019 Mar 30      70           8          3
(NOAA)

Weekly Propagation Forecast Bulletins

Product: Weekly Highlights and Forecasts
:Issued: 2018 Apr 23 0149 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact www.swpc.noaa.gov/weekly.html
#
#                Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity 16 - 22 April 2018

Solar activity was very low. Region 2706 (N03, L=281, class/area Dao/130 on 22 Apr) produced the strongest flare of the period, a B5 at 20/1704 UTC. The region continued slow growth through the end of the reporting period. 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 high levels on 10-20 Apr; high levels on 22 Apr and
moderate to high levels for the remaining days of the reporting period. The peak flux observed was 24,100 pfu at 21/2120 UTC.

Geomagnetic field activity was quiet until 20 Apr, when unsettled to G2 (Moderate) geomagnetic conditions were observed in response to CIR ahead of a negative polarity CH HSS. Total field peaked at 23 nT around 20/0510 UTC and slowly declined to around 5 nT by late on 20 Apr. Solar wind speeds were increased from around 290 km/s to a peak of near 620 km/s during the HSS proper late on 20 Apr. The geomagnetic response decreased to quiet to unsettled conditions over 21 Apr and finally to quiet on 22 Apr as influence from the CH HSS waned.

Forecast of Solar and Geomagnetic Activity 23 April - 19 May 2018

Solar activity is expected to be very low 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 be at moderate to high levels on 23-30 Apr and 07-19
May; normal to moderate levels are expected from 01-06 May. Elevated levels of electron flux are expected due to the anticipation of multiple, recurrent CH HSSs.

Geomagnetic field activity is expected to reach unsettled levels on 26 Apr, 06 May, 09-10 May and 19 May; active levels are expected on 27 Apr, 07-08 Apr and 18 May; G2 (Moderate) geomagnetic storm conditions are likely on 17 May. All enhancements in geomagnetic field activity are associated with the anticipated influence of multiple, recurrent CH HSSs. The remaining days of the outlook
periods are expected to be mostly quiet.

Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2018 Apr 23 0149 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact www.swpc.noaa.gov/wwire.html
#
#      27-day Space Weather Outlook Table
#                Issued 2018-04-23
#
#   UTC      Radio Flux   Planetary   Largest
#  Date       10.7 cm      A Index    Kp Index
2018 Apr 23      75           5          2
2018 Apr 24      75           5          2
2018 Apr 25      75           5          2
2018 Apr 26      75           8          3
2018 Apr 27      75          12          4
2018 Apr 28      75           5          2
2018 Apr 29      75           5          2
2018 Apr 30      75           5          2
2018 May 01      75           5          2
2018 May 02      75           5          2
2018 May 03      70           5          2
2018 May 04      70           5          2
2018 May 05      70           5          2
2018 May 06      70          10          3
2018 May 07      70          15          4
2018 May 08      70          12          4
2018 May 09      70          10          3
2018 May 10      70           8          3
2018 May 11      70           5          2
2018 May 12      70           5          2
2018 May 13      70           5          2
2018 May 14      70           5          2
2018 May 15      70           5          2
2018 May 16      70           5          2
2018 May 17      75          42          6
2018 May 18      75          12          4
2018 May 19      75           8          3
(NOAA)

Weekly Propagation Forecast Bulletins

Product: Weekly Highlights and Forecasts
:Issued: 2017 Jul 31 0238 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact http://www.swpc.noaa.gov/weekly.html
#
#                Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity 24 - 30 July 2017 Solar activity was very low throughout the summary period. A B1 flare, observed at 27/2136 UTC from a plage region near center disk, was the strongest event of the period. Region 2668 (N03, L=311, class/area Axx/010 on 25 Jul) decayed to plage by 26 Jul and Region 2669 (N18, L=255, class/area Axx/010 on 30 Jul) remained inactive. 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 was at normal to high levels on 26 Jul, high levels on 30 Jul and moderate
to high levels throughout the remaining days of the period. A maximum flux of 18,800 pfu was observed at 25/1515 UTC. The enhancements in flux levels were due to persistently elevated solar
winds from a slowly-waning, positive polarity CH HSS. Geomagnetic field activity ranged from quiet to active levels over the past week. Quiet to active levels were observed on 24 Jul and 26 July; quiet to unsettled levels were observed on 25 Jul and 27-28 Jul; the remaining days were quiet. Geomagnetic activity was associated with the influence of a slowly-waning, positive polarity
CH HSS enhancing solar wind speeds. A steady decline in wind speed was observed over the entire reporting period from a peak speed of 705 km/s at 24/2219 UTC to a low of around 350 km/s by the end of 30 Jul.

Forecast of Solar and Geomagnetic Activity 31 July - 26 August 2017
Solar activity is expected to be at low levels with a chance for M-class flare (R1-R2/Minor-Moderate) on 31 Jul - 13 Aug due to the return of old Region 2665 (S06, L=113) rotating across the visible
disk. The remainder of the outlook period is expected to be at very low levels.  No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is expected to range from normal background to high levels. High levels are expected on 01-03 Aug, 05-10 Aug, and 18-26 Aug; moderate levels are expected 31 Jul and 11 Aug; normal background levels are expected for 04 Aug and 12-17 Aug. All enhancements in electron flux are due to multiple anticipated recurrent CH HSSs.
Geomagnetic field activity is expected to range from quiet to G1 (Minor) geomagnetic storm levels. G1 (Minor) storm levels are likely on 04-05 Aug and again on 17-18 Aug; active conditions are likely on 31 Jul, 06 Aug and 19 Aug; unsettled levels are likely on 01-02 Aug, 07 Aug and 20-21 Aug; quiet conditions are expected for the remaining days of the outlook period. All anticipated enhancements in geomagnetic activity are due to multiple, recurrent CH HSSs.

Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2017 Jul 31 0238 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact http://www.swpc.noaa.gov/wwire.html#
#      27-day Space Weather Outlook Table
#                Issued 2017-07-31
#
#   UTC      Radio Flux   Planetary   Largest
#  Date       10.7 cm      A Index    Kp Index
2017 Jul 31      78          12          4
2017 Aug 01      78          10          3
2017 Aug 02      78           8          3
2017 Aug 03      75           5          2
2017 Aug 04      75          25          5
2017 Aug 05      75          18          5
2017 Aug 06      75          12          4
2017 Aug 07      75           8          3
2017 Aug 08      75           5          2
2017 Aug 09      75           5          2
2017 Aug 10      75           5          2
2017 Aug 11      75           5          2
2017 Aug 12      75           5          2
2017 Aug 13      75           5          2
2017 Aug 14      73           5          2
2017 Aug 15      70           5          2
2017 Aug 16      70           5          2
2017 Aug 17      70          15          5
2017 Aug 18      70          15          5
2017 Aug 19      70          12          4
2017 Aug 20      70          10          3
2017 Aug 21      70          10          3
2017 Aug 22      70          10          3
2017 Aug 23      70           5          2
2017 Aug 24      70           5          2
2017 Aug 25      70           5          2
2017 Aug 26      70           5          2
(NOAA)

Weekly Propagation Forecast Bulletins

Product: Weekly Highlights and Forecasts
:Issued: 2017 Jan 23 0615 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact www.swpc.noaa.gov/weekly.html 
#
#                Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity 16 - 22 January 2017

Solar activity was at low levels due to a C9/1f flare observed at 21/0726 UTC from Region 2628 (N12, L=173, class/area Dao/210 on 22 January). Region 2628 was responsible for additional C-class flaring on 21 January. The rest of the period was at very low levels. 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 to moderate levels with high levels observed on 16-17, and 20-22 January. The largest flux value of the period was 3,090 pfu observed at 16/1935 UTC. 

Geomagnetic field activity ranged from quiet to active levels over the period. Solar wind parameters were indicative of background conditions to start the period. Early on 18 January, wind speed began to increase as a positive polarity coronal hole high speed stream (CH HSS) became geoeffective. Wind speed reached a maximum value of 651 km/s at 19/0320 UTC and total field peaked at 17 nT at 18/0605 UTC before gradually decreasing throughout the remainder of the period. The geomagnetic field was at quiet levels on 16-17 January, quiet to active levels on 18-19 & 21 January, and quiet to unsettled levels on 20 & 22 January. 

Forecast of Solar and Geomagnetic Activity 23 January - 18 February 2017

Solar activity is likely to be low with a slight chance for M-class flares on 23-31 January and 14-18 February due to the flare potential in Region 2628. Very low levels are expected on 01-13 February. 

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 on 23-27 January, 01-13 February, and again on 16-18 February due to CH HSS influence. 

Geomagnetic field activity is expected to be at unsettled to active levels on 23, 27-31 January, 01-07 February and 14-18 February with G1 (Minor) geomagnetic storm levels likely on 03 February due to recurrent CH HSS effects. 

Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2017 Jan 23 0615 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact www.swpc.noaa.gov/wwire.html
#
#      27-day Space Weather Outlook Table
#                Issued 2017-01-23
#
#   UTC      Radio Flux   Planetary   Largest
#  Date       10.7 cm      A Index    Kp Index
2017 Jan 23      85           8          3
2017 Jan 24      83           5          2
2017 Jan 25      82           5          2
2017 Jan 26      80           5          2
2017 Jan 27      80          12          4
2017 Jan 28      80          15          4
2017 Jan 29      78           8          3
2017 Jan 30      77          10          3
2017 Jan 31      77          12          4
2017 Feb 01      76          16          4
2017 Feb 02      76          18          4
2017 Feb 03      75          20          5
2017 Feb 04      75          16          4
2017 Feb 05      75          12          4
2017 Feb 06      75          10          3
2017 Feb 07      75           8          3
2017 Feb 08      76           5          2
2017 Feb 09      77           5          2
2017 Feb 10      77           5          2
2017 Feb 11      77           5          2
2017 Feb 12      77           5          2
2017 Feb 13      78           5          2
2017 Feb 14      79          15          4
2017 Feb 15      81          10          3
2017 Feb 16      83          10          3
2017 Feb 17      83           8          3
2017 Feb 18      83           8          3
(NOAA)

Weekly Propagation Forecast Bulletins

Product: Weekly Highlights and Forecasts
:Issued: 2016 Oct 24 0702 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web www.swpc.noaa.gov/weekly.html
#
#                Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity 17 - 23 October 2016 Solar activity was very low to low with a single C-class flare observed on 17 Oct. At 17/0038 UTC, a C4 flare was observed from
Region 2599 (S15, L=144, class/area Cko/460 on 05 Oct) which had rotated around the southwest limb on 15 Oct. A nine degree long filament, centered near N26W02, was observed erupting in SDO/AIA 304 and GONG imagery at about 20/1300 UTC. A slow-moving, faint CME was
observed in LASCO C2 imagery with possible effects observed on 23 October. No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit ranged from normal to very high levels. On 18 Oct very high levels were observed, with a peak level of 52,137 pfu. High levels were observed on 17 Oct and 19-22 Oct. Normal to high levels were observed on 23 Oct. Geomagnetic field activity during the reporting period ranged from quiet to active levels. Quiet to active conditions were observed on 17 Oct and tapered into quiet to unsettled levels through 19 Oct due to the waning effects of a CH HSS. Quiet conditions were observed from 20-22 Oct under an ambient solar wind regime. Quiet to unsettled conditions were noted 23-24 Oct due to a SSBC and initial
CH HSS effects.

The solar wind environment was above background levels on 17 Oct under the influence of a CH HSS with wind speeds between 700-800 km/s. Wind speeds gradually tapered to background conditions on 18-19 Oct. Winds increased again to around 450 km/s and minor enhancements to total field were observed on 23 Oct due to a SSBC and weak CH HSS effects.

Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2016 Oct 24 0702 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact: www.swpc.noaa.gov/wwire.html
#
#      27-day Space Weather Outlook Table
#                Issued 2016-10-24
#
#   UTC      Radio Flux   Planetary   Largest
#  Date       10.7 cm      A Index    Kp Index
2016 Oct 24      76          32          6
2016 Oct 25      74          44          6
2016 Oct 26      73          40          6
2016 Oct 27      71          22          5
2016 Oct 28      70          18          5
2016 Oct 29      71          18          5
2016 Oct 30      77          14          4
2016 Oct 31      80          20          5
2016 Nov 01      80          12          4
2016 Nov 02      80           5          2
2016 Nov 03      80           5          2
2016 Nov 04      80           5          2
2016 Nov 05      80           5          2
2016 Nov 06      80           8          3
2016 Nov 07      78           5          2
2016 Nov 08      78           5          2
2016 Nov 09      78           5          2
2016 Nov 10      78           5          2
2016 Nov 11      75          10          3
2016 Nov 12      75          15          4
2016 Nov 13      73          18          5
2016 Nov 14      73          10          3
2016 Nov 15      73           8          3
2016 Nov 16      73           5          2
2016 Nov 17      75           5          2
2016 Nov 18      75           5          2
2016 Nov 19      75          10          3
(NOAA)

Weekly Propagation Forecast Bulletins

Product: Weekly Highlights and Forecasts
:Issued: 2008 May 29 2000 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
19 - 25 May 2008

Solar activity was very low. No X-ray flares were observed during the period. Regions 994 (S12, L=310, class/area, Bxo/020 on 19 May) and 996 (N09, L=256, class/area, Bxo/010 on 19 May) were on the disk when the period began as B-type groups. By 21 May both of these regions had decayed to spotless plage, and remained spotless through the remainder of the period.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit reached high levels during 23 - 25 May.

The geomagnetic field was at quiet to unsettled levels during the summary period. Activity levels did increase on 21 May to quiet to active levels due to a coronal hole high speed stream. Solar wind speed measurements from the ACE spacecraft began the period at around 340 km/s and slowly increased to a maximum of approximately 630 km/s at 1432 UTC on 21 May. The inter-planetary magnetic field (IMF) Bz component during this time ranged between +/- 7. Solar wind speeds declined throughout the rest of the summary period to end at about 450 km/s, with IMF Bz ranging between +/- 5.

Forecast of Solar and Geomagnetic Activity
28 May - 23 June 2008

Solar activity is expected to be very low.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach high levels during 01 - 10 June and 19 - 23
June.

The geomagnetic field is expected to be at quiet levels on 28 May. On 29 May a coronal hole high speed stream is expected to rotate into a geoeffective position and increase activity levels to quiet to unsettled levels; isolated periods of active conditions may be observed during this period. On 10 June activity levels should decrease again to mostly quiet conditions through 14 June. Another coronal hole high speed stream is expected to impact the geomagnetic field on 15 June. Activity levels should increase again to quiet to unsettled levels, with a chance for isolated active conditions. On 23 June conditions are expected to be at quiet levels.

Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2008 May 29 1607 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 2008 May 29
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2008 May 30 68 10 3
2008 May 31 68 8 3
2008 Jun 01 68 10 3
2008 Jun 02 68 10 3
2008 Jun 03 68 10 3
2008 Jun 04 68 5 2
2008 Jun 05 68 10 3
2008 Jun 06 68 10 3
2008 Jun 07 68 10 3
2008 Jun 08 68 10 3
2008 Jun 09 68 10 3
2008 Jun 10 70 5 2
2008 Jun 11 70 5 2
2008 Jun 12 72 5 2
2008 Jun 13 72 5 2
2008 Jun 14 72 5 2
2008 Jun 15 70 8 3
2008 Jun 16 70 15 3
2008 Jun 17 70 5 2
2008 Jun 18 70 15 3
2008 Jun 19 68 10 3
2008 Jun 20 68 10 3
2008 Jun 21 68 10 3
2008 Jun 22 68 10 3
2008 Jun 23 68 5 2
(NOAA)