Monthly Preliminary Report
MPR
Kjell Inge Malde, Director/Editor Web: http://www.cv-helios.net  
Hunsteinstien 42A, N-4083 Hundvaag  NORWAY Email: cvhelios@gmail.com  
             
Volume 43 Number 9               MPR no. 506               September 2023               ISSN 2535-3780
CV-Helios Network
Monthly Preliminary Report for September 2023
Solar Cycle 25: Month no. 46
Report id.: cv2309 - CV-report no.: 506
Memno. Name Country CV Obs K Obs. Tot.
CV-001 KJELL INGE MALDE NORWAY 129,3 17 1,159 9292
CV-010 FRANKY DUBOIS BELGIUM 100,5 19 0,880 9681
CV-019 ELMAR JUNKER GERMANY 127,2 11 1,229 3846
CV-023 HARTMUT BRETSCHNEIDER GERMANY 71,0 27 0,635 5912
CV-040 ROBERTO BATTAIOLA ITALY 110,1 10 0,948 2137
CV-077 ANDREW JOHNSTON UNITED KINGDOM 89,8 12 0,917 3678
CV-080 JAN JANSSENS BELGIUM 113,3 3 1,089 1226
CV-082 PIOTR URBANSKI POLAND 112,8 28 1,029 5539
CV-086 TOS POLAND POLAND 115,2 30 1,044 8696
CV-102 PAULO ROBERTO MOSER BRAZIL 104,8 26 0,949 3077
CV-105 ALEXEY RYBACK RUSSIA 136,9 14 1,065 3492
CV-116 TERJE BJERKGAARD NORWAY 164,0 1 1,004 1035
CV-135 GEMA ARAUJO SPAIN 132,6 30 1,204 7500
CV-136 FAUSTINO GARCIA SPAIN 79,4 21 0,717 3982
CV-139 JAVIER ALONSO SPAIN 127,9 15 1,092 4129
CV-151 JEFFREY CARELS BELGIUM 77,4 16 0,792 3246
CV-181 ADAM DERDZIKOWSKI POLAND 107,5 26 1,012 1200
CV-198 DENIS WALLIAN FRANCE 173,5 20 1,584 628
CV-204 STEFAN MEISTER SWITZERLAND 95,7 18 0,852 815
CV-207 ONDREJOV OBS. (AI CAS) CZECH REPUBLIC 132,2 25 1,195 3808
CV-208 JOHAN NEYS BELGIUM 124,0 8 1,163 770
CV-214 IGOR GRAGEDA MENDEZ BOLIVIA 97,9 29 0,876 1291
CV-215 ARNAUD MENGUS FRANCE 112,2 5 1,003 355
CV-219 KANDILLI OBSERVATORY TURKEY 104,1 27 0,898 962
CV-220 MICHEL FRANGEUL FRANCE 78,5 13 0,723 179
CV-222 MILENA NIEMCZYK POLAND 116,2 23 1,115 72
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
Totals Observers Days CV No K  
26 30 112,85 474 1,007  
Results
Date CV Obsrvrs Regions
 6 rot.		 CV-USAF 6-rot.
 6 rot.		 CV-6 rot. CV-13 rot.
1 94,43 13 7,42 116,18 118,18 107,86
2 80,75 15 7,41 116,30 118,00 107,81
3 46,93 13 7,42 116,35 117,80 107,73
4 65,28 18 7,42 116,23 117,50 107,65
5 69,84 18 7,42 115,96 117,07 107,61
6 88,94 17 7,41 115,82 116,83 107,63
7 106,21 18 7,41 115,45 116,71 107,76
8 92,11 18 7,40 115,26 116,45 107,82
9 91,39 17 7,37 115,30 116,22 107,89
10 145,50 13 7,37 115,90 116,47 108,08
11 139,06 15 7,40 116,45 116,79 108,22
12 134,64 14 7,44 117,04 117,26 108,31
13 102,53 15 7,45 117,55 117,64 108,28
14 111,71 17 7,46 118,05 118,17 108,20
15 85,06 15 7,48 118,38 118,64 108,10
16 66,46 12 7,51 118,62 119,02 108,00
17 77,93 14 7,53 118,75 119,27 107,97
18 116,06 15 7,57 119,49 119,62 108,09
19 147,93 14 7,62 120,13 120,23 108,31
20 161,41 16 7,68 120,93 120,97 108,57
21 180,67 11 7,71 121,42 121,46 108,74
22 180,83 11 7,76 121,70 121,83 108,90
23 163,41 17 7,79 122,06 122,17 109,02
24 140,19 21 7,80 122,29 122,30 109,09
25 140,71 16 7,81 122,26 122,22 109,15
26 112,74 18 7,82 122,16 122,04 109,16
27 99,08 12 7,82 121,82 121,83 109,15
28 106,75 11 7,80 121,54 121,68 109,14
29 90,83 11 7,80 121,26 121,60 109,13
30 94,63 16 7,80 121,31 121,69 109,12
             
 Totals/ 3,96 27,3 0,97 4,83 119,26 108,35
Avrgs
CV and CV observers          
 
           
CV-13 rot. per Sep 2023  
             
Latest sunspot regions developments          
   
Reg.-First-Last-Lat.-Long.-Rot.-Area-Lgth.-CV-
max.		  
  3436,17.09.23,20.09.23,21.09.23,20,195,2275,220,DAI,22
Region,First date,Max.date,Last date,Lat.,Long.,Rot.,Max.mvh,Max class,Max CV 3437,18.09.23,20.09.23,23.09.23,-18,175,2275,190,DAI,22
3421,03.09.23,06.09.23,11.09.23,14,343,2275,220,DAI,22 3443,21.09.23,23.09.23,26.09.23,28,147,2275,260,DKI,46
3423,04.09.23,11.09.23,15.09.23,16,282,2275,420,EKC,56  
3425,06.09.23,08.09.23,20.09.23,23,247,2275,140,DAI,22  
3435,16.09.23,20.09.23,29.09.23,9,105,2275,300,DKI,46  
   
   
             
:Product: Weekly Highlights and Forecasts        
Highlights of Solar and Geomagnetic Activity  
02 - 08 October 2023 http://services.swpc.noaa.gov/text/weekly.txt
   
Solar activity was at low to moderate levels. Moderate levels were  
observed on 02 Oct due to an M1.9/1n (R1-Minor) flare at 02/1249 UTC  
from Region 3455 (N25, L=274, class/area=Cro/020 on 02 Oct, the  
strongest of the period. Moderate levels were again observed on 07  
Oct due to an M1.7/Sb flare at 07/1806 UTC from Region 3406 (S10,  
L=232, class/area=Dai/080 on 08 Oct). Associated with the event was  
Type II radio sweep and a narrow, faint CME that was headed east of  
the Sun-Earth line. The remaining 15 numbered active regions were  
either quiet to only produced C-class (below R1-Minor) activity.   
   
No proton events were observed at geosynchronous orbit.  
   
The greater than 2 MeV electron flux at geosynchronous orbit reached  
high levels on 03 Oct and was moderate for the remainder of the  
reporting period.   
   
   
Solar activity is expected to be low with a chance for moderate  
conditions through the outlook period due to the flare potential  
from active regions currently on the visible disk and regions that  
have produced moderate activity that expected to return from the  
Sun's farside.   
   
No proton events are expected at geosynchronous orbit.        
Progress Solar Cycle no. 25          
The above graphic show CV-Int. levels solar cycle 25 compared to same stage previous cycles 21-24.
Highlights September 2023          
The solar activity is still rising though many regions have been of very modest sizes.  
However, both CV-I 6 and 13 rotational averages have reached interesting values.  
The 6-rot. averages have now superseded cycle 24, and the first time  
this happened was on 01 May this year!  
Report-end this MPR 506 for September correspond to 24th March 2002 (day 1405),  
and the 6-rot. Average has now turned and compared to cycle 23 we are about 9 CV-units under.  
When it comes to the 6-rotation averages we are now a little below cycle 23!  
A total of 713 regions this cycle per end October 2023 (353 regions North and 360 regions South).  
At the same time solar cycle 24 produced 561 regions .(230 north and 331 south)  
   
Region,First date,Max.date,Last date,Lat.,Long.,Rot.,Max.mvh,Max class,Max CV  
3421,03.09.23,06.09.23,11.09.23,14,343,2275,220,DAI,22  
3423,04.09.23,11.09.23,15.09.23,16,282,2275,420,EKC,56  
3425,06.09.23,08.09.23,20.09.23,23,247,2275,140,DAI,22  
3435,16.09.23,20.09.23,29.09.23,9,105,2275,300,DKI,46  
3436,17.09.23,20.09.23,21.09.23,20,195,2275,220,DAI,22  
3437,18.09.23,20.09.23,23.09.23,-18,175,2275,190,DAI,22  
3443,21.09.23,23.09.23,26.09.23,28,147,2275,260,DKI,46  
3445,22.09.23,25.09.23,30.09.23,-14,75,2275,220,DAI,22  
We expect a major upgoing of CV-I totals later on this year.  
3448,25.09.23,27.09.23,07.10.23,13,354,2276,130,HSX,10  
3449,26.09.23,29.09.23,03.10.23,15,10,2275,120,CSI,12  
   
It now seems that prediction mix of 6 and 13 rotation averages may indicate maximum 14.08.2025 (+/- 2 rot.)  
as a time of maximum for the CV-I (but still, may be one rotation later). Updates will come.  
   
We reckon there have passed 1395 days (solar flux 1432 days) of the new cycle by this issue.  
We may see a continued production of smaller regions for a while   
but by the end of year expect more active periods!  
   
Solar Flux onset: OCCURED 30 September 2022, the Onset 13 rot. ctrd. Occurred 18 Mar 2023.  
Stay tuned and observe the solar disk from now on!  
Please remember you are always welcome to contribute with drawings and photos!  
   
TAKE A SURVEY:  
Here is a Survey of hmiigr SOHO solar images 2022.  
https://www.cv-helios.net/helios/cv/web/2022/Video2022.mov  
             
Pictures from last month - Observer contributions, etc.        
  Photo courtesy: Thanks to CV-135 Gema Araujo, Spain Highlights September 2023    
  Thank you, Gema Araujo, for giving us access to your large collection of solar images  
  Left: Photo from CV-135 Gema Araujo, Spain  
  from 21 September 2023.  
  Picture below in H-alpha