CV-Helios Network
Monthly Preliminary Report
 for April 2026
Monthly Preliminary Report  for April 2026
Monthly Preliminary Report
  MPR 531   1 PAGE 1 46 4 537 April 2026 CV for April 2026 Observers in April 2026 CV-13 rot. per April 2026   Annual Final Report: ISSN 2535-3799 This MPR issued 15th May 2026 5 ###### 30.04.2026 20 :Issued: 2026 May 11 0150 UTC 2026 May 11 ## 15.05.2026 4 44          
MPR   editor text close   1                       2604 08.2020 30          
Kjell Inge Malde, Director/Editor Web: https://www.cv-helios.net   15.02.2026 18:37          
cv-helios01sort
           
Hunsteinstien 42A, N-4083 Hundvaag  NORWAY Email: cvhelios@gmail.com       1                  
                  1                  
Volume 46 Number 4               MPR no. 537               April 2026               ISSN 2535-3780     1   Volume 46 Number 4               MPR no. 537               April 2026               ISSN 2535-3780     15.05.2026 18:35 UTC
CV-Helios Network     1                              
Monthly Preliminary Report for April 2026   <<< remove after UPDATE LINK 1  
Solar Cycle 25: Month no. 77  
LINK 1   January Jan Jan
Report id.: cv2604 - CV-report no.: 537   LINK 1   https://pinetools.com/colorize-image February Feb Feb AWARDS                
Memno. Name Country CV Obs Obs. Tot.     1  
March Mar Mar Rank CV-no. - Name Now Milestone Remaining
CV-001 KJELL INGE MALDE NORWAY 94,0 21 9918   LINK 1   April Apr Apr 0 0 0 1 1 CV-001 KJELL INGE MALDE 0 0 0     1      
CV-010 FRANKY DUBOIS BELGIUM 65,5 26 10317   LINK 1   May Mai May 0 0 0 1 2             2      
CV-019 ELMAR JUNKER GERMANY 103,1 8 4047   LINK 1   June Jun Jun 0 0 0 1 3             3      
CV-023 HARTMUT BRETSCHNEIDER GERMANY 56,4 22 6496   LINK 1   July Jul Jul 0 0 0 1 4            
CV-040 ROBERTO BATTAIOLA ITALY 95,7 6 2273   LINK 1   August Aug Aug 0 0 0 1 5            
CV-068 SVEN OVE THIMM DENMARK 60,6 18 4685   LINK 1   September Sep Sep 0 0 0 1 6            
CV-077 ANDREW JOHNSTON UNITED KINGDOM 72,9 28 4162   LINK 1   October Okt Oct 0 0 0 1 7            
CV-080 JAN JANSSENS BELGIUM 78,0 1 1267   LINK 1   November Nov Nov 0 0 0 1 8            
CV-082 PIOTR URBANSKI POLAND 75,8 30 6222   LINK 1   Updated 15.05.2026 17:35 UTC December Des Dec 0 0 0 1 9            
CV-086 TOS POLAND POLAND 81,7 30 9602   LINK 1   1,000 normal time 01:00 0 0 0 1 10            
CV-091 GRZEGORZ DALEK POLAND 77,0 24 5278   LINK 1   2,000 summertime 02:00 0 0 0 1 11            
CV-105 ALEXEY RYBACK RUSSIA 84,8 16 3894   LINK 1   0 0 0 1 12            
CV-122 VLASTISLAV FEIK CZECH REPUBLIC 102,2 13 3520   LINK 1   0 0 0 1 13            
CV-135 GEMA ARAUJO SPAIN 84,1 30 8413   LINK 1   0 0 0 1 14            
CV-136 FAUSTINO GARCIA SPAIN 61,1 18 4430   LINK 1   0 0 0 1 15            
CV-139 JAVIER ALONSO SPAIN 90,4 20 4592   LINK 1   0 0 0 1 16            
CV-151 JEFFREY CARELS BELGIUM 69,4 13 3576   LINK 1   0 0 0 1 17            
CV-171 WALTER JOSE MALUF BRAZIL 120,3 25 3660   LINK 1   0 0 0 1 18            
CV-181 ADAM DERDZIKOWSKI POLAND 90,1 21 1471   LINK 1   0 0 0 1 19            
CV-198 DENIS WALLIAN FRANCE 90,5 20 797   LINK 1   0 0 0 1 20            
CV-205 TOM MANGELSDORF UNITED STATES 155,0 1 67   LINK 1   0 0 0 1 21            
CV-207 ONDREJOV OBS. (AI CAS) CZECH REPUBLIC 108,1 26 4466   LINK 1   0 0 0 1 22            
CV-208 JOHAN NEYS BELGIUM 103,1 14 1001   LINK 1   0 0 0 1 23            
CV-209 CAIO CRESPO MORAES BRAZIL 101,0 11 741   LINK 1   0 0 0 1 24            
CV-214 IGOR GRAGEDA MENDEZ BOLIVIA 91,3 20 2007   LINK 1   0 0 0 1 25            
CV-215 ARNAUD MENGUS FRANCE 55,0 1 460   LINK 2   0 0 0 1 26            
CV-220 MICHEL FRANGEUL FRANCE 51,3 13 454   LINK 2   0 0 0 1 27            
CV-224 SWO-NOAA  (CV-USAF) UNITED STATES 95,5 29 2311   LINK 2   0 0 0 1 28            
              LINK 2   0 0 0 1 29            
              LINK 2   0 0 0 1 30            
              LINK 2   0 0 0 1 31            
              LINK 2   0 0 0 1 32            
              LINK 2   0 0 0 1 33            
              LINK 2   0 0 0 1 34            
              LINK 2   0 0 0 1 35            
              LINK 2   0 0 0 1 36            
              LINK 2   0 0 0 1 37            
              LINK 2   0 0 0 1 38            
              LINK 2   0 0 0 1 39            
              LINK 2   0 0 0 1 40            
                2   0 0 0 1 41            
                2   0 0 0 1 42            
                2   0 0 0 1 43            
                2   0 0 0 1 44            
                2   0 0 0 1 45            
                2   0 0 0 1 46            
                2   0 0 0 1 47            
                2   0 0 0 1 48            
                2   0 0 0 1 49            
                2   0 0 0 1 50            
Totals Observers Days CV Obs.       2  
28 30 86,21 505       2  
Month Results for April 2026     3 PAGE 2
Date CV Obsrvrs Regions
 6 rot.		 CV-USAF
6-rot.		 CV-
6 rot.		 CV-
13 rot.		     3  
1 136,00 11 6,3 87,5 89,6 102,2   LINK 3  
2 131,42 19 6,3 87,4 90,1 102,2   LINK 3  
3 110,75 16 6,3 87,6 90,3 102,2   LINK 3  
4 92,83 12 6,3 87,8 90,4 102,2   LINK 3  
5 86,63 16 6,3 87,9 90,5 102,3   LINK 3  
6 77,28 18 6,3 88,0 90,4 102,2   LINK 3  
7 74,70 20 6,3 88,0 90,3 102,1   LINK 3  
8 68,94 16 6,3 88,1 90,3 101,9   LINK 3  
9 52,71 17 6,3 88,1 90,1 101,7   LINK 3  
10 18,11 9 6,2 88,0 89,8 101,5   LINK 3  
11 30,71 14 6,2 87,8 89,6 101,3   LINK 3  
12 40,73 11 6,2 87,9 89,6 101,0   LINK 3  
13 54,44 9 6,2 88,2 89,8 100,8   LINK 3  
14 61,67 9 6,2 88,4 90,2 100,6   LINK 3  
15 55,38 16 6,2 89,2 90,3 100,4   LINK 3  
16 63,56 16 6,2 88,5 90,1 100,2   LINK 3  
17 62,89 18 6,2 88,1 89,9 100,1   LINK 3  
18 58,19 16 6,2 87,8 89,6 100,0   LINK 3  
19 48,32 19 6,2 87,4 89,0 99,7   LINK 3  
20 45,12 17 6,2 86,9 88,4 99,6   LINK 3  
21 61,59 17 6,1 86,7 87,9 99,6   LINK 3  
22 78,11 19 6,1 86,3 87,5 99,7   LINK 3  
23 66,55 20 6,1 86,0 87,1 99,7   LINK 3  
24 98,36 22 6,1 86,1 86,9 99,8   LINK 3  
25 119,30 20 6,1 86,3 86,9 99,9   LINK 3  
26 132,47 15 6,1 86,6 87,1 99,9   LINK 3  
27 128,69 13 6,1 86,9 87,3 99,9   LINK 3  
28 129,59 17 6,1 87,3 87,8 100,0   LINK 3  
29 137,39 18 6,1 88,1 88,6 100,1   LINK 3  
30 141,44 16 6,1 88,9 89,2 100,3   LINK 3  
                LINK 3  
 Totals/ 82,13 15,9 6,19 87,60 89,15 100,77   LINK 3  
Avrgs     3  
CV and CV observers               4 PAGE 3
 
    NOTE! Line for CV-observers - endpoint must be adjusted for month end date 537-1 4  
CV-13 rot. per Apr 2026       4  
      537-2 4  
      srsCV-USAF LINK 5  
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:Product: Weekly Highlights and Forecasts             tp-2017 LINK 5  
Highlights of Solar and Geomagnetic Activity  
Update PRF
tp-2017 LINK 5  
04 - 10 May 2026   tp-2017 LINK 5   4 Januar January mandag
  Click on link below   tp-2017 LINK 5   5 Februar February tirsdag
Solar activity reached high levels on 10 May due to an M5.7/2b flare to read the full weekly   tp-2017 LINK 5   2026 Mars March onsdag
(R2-Moderate) at 10/1339UTC from Region 4436 (N19, L=330, Weekly PRF text at NOAA gov   tp-2017 LINK 5   pres. 11.05.2026 April April torsdag
class/area=Dao/beta on 10 May), the strongest of the period.   tp-2017 LINK 5   15.05.2026 Mai May fredag
Associated with the event was a Type II radio sweep (est. 650 km/s),     tp-2017 LINK 5   4 Juni June lørdag
Tenflare (550sfu), and a CME signature first observed in coronagraph   next tp-2017 LINK 5   next 18.05.2026 Juli July søndag
imagery at 10/1348UTC towards the NE. Analysis and modeling of the   18.05.2026 tp-2017 LINK 5   3 August August 15.05.2026 6
event is ongoing at the time of this writing.      tp-2017 LINK 5   September September 16.05.2026 7
  National Oceanic and Atmospheric Administration logo
    tp-2017 LINK 5   Oktober October 17.05.2026 1
Region 4424 (N17, L=192, class/area=Eai/160 on 30 Apr) also produced     tp-2017 LINK 5   9 November November 18.05.2026 2
an M-class event with an M1.8 flare (R1-Minor) observed at 04/0133     tp-2017 LINK 5   12 Desember December 19.05.2026 3
UTC. The other 10 numbered active regions on this visible disk were     tp-2017 LINK 5   20.05.2026 4
either mostly quiet or only produced C-class activity during the     tp-2017 LINK 5   21.05.2026 5
past week      tp-2017 LINK 5  
      tp-2017 LINK 5  
      tp-2017 LINK 5  
      tp-2017 LINK 5  
      tp-2017 LINK 5  
Solar activity is expected to be at low levels, with a chance for     tp-2017 LINK 5  
M-class activity (R1/R2-Minor/Moderate), and a slight chance for     tp-2017 LINK 5  
X-class (R3-Strong), throughout the outlook period due to the flare     tp-2017 LINK 5  
potential of several active regions both currently on the visible     tp-2017 LINK 5  
disk and those expected to return from the Sun&#39;s farside.      tp-2017 LINK 5  
      tp-2017 LINK 5  
                tp-2017 LINK 5  
Comparing Solar Cycles 21-25               manual 6 PAGE 4
Graphic showing CV-Int. 13 rot. avrgs. - It seems we can compare to solar cycle 21 at the moment
 
manual save 537-3 6 Diagram 3  
Highlights April 2026            
The solar activity in April 2026 was another low month activitywise and quite weak.    
Largest regions from Apr 2026, were 4419 reached EKI, 4420 at FKC, 4425 at EKC      
We note that there are quite a number of small HSX/HAX and simple C-groups dominating now.      
A guess is that this trend will continute for some time.      
Auroras have been observed several places.      
       
Status per 15.05.2026:       
CV 6 rot. highest since 10.08.2014 (11,8 years ago),       
CV 13 rot. highest since 06.02.2015 (11,3 years ago).      
       
A total of 1678 regions this cycle per end May 2026 (800 regions North and 878 regions South).       
At the same time solar cycle 24 produced 1302 regions .(628 north and 674 south).      
       
Update per 30.04.2026 - 6 rot. averages (rising)      
Cycle 25: 23,0 CV-units over  cycle 21 (rising)      
Cycle 25: 15,1 CV-units under  cycle 22 (falling)      
Cycle 25: 51,6 CV-units under  cycle 23 (falling)      
Cycle 25: 14,6 CV-units over  cycle 24 (falling)      
       
Update per 30.04.2026 - 13 rot. averages (rising)      
Cycle 25: 6,5 CV-units over  cycle 21 (falling)      
Cycle 25: 14,7 CV-units under  cycle 22 (falling)      
Cycle 25: 50,6 CV-units under  cycle 23 (falling)      
Cycle 25: 19,2 CV-units over  cycle 24 (falling)      
       
We are nearing a comparable cycle 25 towards end stage of cycle 24 at this time.      
       
A long research of data adopted from submissions CV-numbers and CV-numbers with classifications      
(cvobs.dat and cvfrmdata3.dat) have been issued on our web site.      
They are published under MENU MONTHLY CLASSIFICATIONS BY CV-HELIOS NETWORK OBSERVERS    
https://www.cv-helios.net/cgi/data/classifications/index.html      
       
Supergroups-catalogue: Finished. Many drawings also to be edited. Published in December 2025      
https://www.cv-helios.net/specialreports/SuperGroupsCatalogue.pdf      
       
The CV-forms for submissions of CV/classifications were down in a period in Feb/Mar, but works OK now!      
Co-worker/assistant at CV-Helios Network? Please contact CV-Helios Network if this is something for you!      
               
Pictures from last month - Observer contributions, etc.         SOHO nasa.gov PAGE 5
  CV-151 JEFFREY CARELS Highlights April 2026     January 2023  
     
     
Disco Luz Blanca
 
     
 
  https://soho.nascom.nasa.gov/data/REPROCESSING/Completed/2026/hmiigr/20260122/20260122_1200_hmiigr_1024.jpg  
       
       
    05.feb.26  
       
       
       
       
       
       
         
       
       
   
 
     
       
     
Awards this month Awards issued       1  
Award no.: 187 to CV-214 IGOR GRAGEDA MENDEZ date 20 April 2026 milestone 2000 CV-obs.!
CONGRATULATIONS!		 Note     
BACKDATE    
Award no.: 188 to CV-208 JOHAN NEYS date 29 April 2026 milestone 1000 CV-obs.!
CONGRATULATIONS!
   
  Congratulations!  
               
New members:   Welcome to:      
    - - -            
                 
                 
                 
      We are now 50 active members (last 12 mo.)  
Sunspot regions of April 2026           PAGE 6
Reg,1stD,Rot,Mo.Yr,Cla;Lat,Long,Mvh   Reg,1stD,Rot,Mo.Yr,Cla;Lat,Long,Mvh    
4404,27.03.26,12,15,183,2309,CSI,12 4418,13.04.26,2,-11,15,2309,CRO,5    
4408,29.03.26,12,9,156,2309,HSX,10 4419,13.04.26,13,13,311,2310,EKI,47    
4409,01.04.26,9,2,156,2309,EAI,23 4420,21.04.26,11,16,224,2310,FKC,57    
4411,03.04.26,3,-5,108,2309,AXX,1 4421,21.04.26,8,-9,204,2310,DSO,25    
4412,05.04.26,3,10,120,2309,BXO,2 4422,21.04.26,5,9,306,2310,CAO,8    
4413,07.04.26,3,8,161,2309,CRI,6 4423,24.04.26,9,-5,206,2310,DAI,22    
4414,07.04.26,5,12,25,2309,HSX,10 4424,24.04.26,11,17,192,2310,EAI,23    
4415,08.04.26,14,-18,14,2309,HSX,10 4425,24.04.26,13,6,161,2310,EKC,56    
4416,10.04.26,10,19,49,2309,DAI,22 4426,26.04.26,1,12,262,2310,AXX,1    
4417,12.04.26,1,-8,123,2309,DAO,19 4427,26.04.26,4,-30,158,2310,AXX,1    
     
     
     
     
     
     
     
  The highlighted sunspot regions are those having large penumbraes.    
     
               
               
Synoptic charts with size indicators            
     
 
   
     
     
   
 
    https://www.cv-helios.net/web/synoptic/year/synrotyear2026.png  
     
     
     
    https//www.cv-helios.net/web/synoptic/year/synrotyear2026.png  
     
     
     
     
     
     
     
     
     
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      spaceweatherlive
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    https://www.cv-helios.net/web/synoptic/rot/synrot2309.png  
     
     
     
     
     
     
     
   
 
               
               
The new CV activity levels            
     
   
 
 
   
     
     
     
     
     
     
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    29695  
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
               
Submissions of Observations            
Option              
  https://www.cv-helios.net/observations/index.html login: solaris   password: cvheliosobs  
1 Two Forms: Obs.Form1 for CV only, Obs.Form2 for Classifications & CV    
2 https://www.cv-helios.net/software.html    
  Excel sheets: Obs.Form1 for CV only, Obs.Form2 for Classifications & CV   NEW form for classifications released!  
3 https://www.cv-helios.net/cvcontactform.html   CLASS-FORM 2024      
             
On Option 2 the cells in A1 (or copy of spreadsheet) can be sent by email to CV-Helios Network    
On Option 3 the cells in A1 can be sent by via Contact Form to CV-Helios Network    
     
Submissions before 15th of proceeding month 18:00 UTC.          
Monitor MPR daily progress            
CV-Helios Network:  Monitor MPR progress as entries are made!    
Monitor your submissions as they are registered:    
https://cv-helios.net/helios/cv/web/mprpost.html    
The data are available fresh from approx. 10:00 UTC until local midnight.    
Content comprises CV-Report for latest month, CV-Report for latest month,
individual results, Extracts from NOAA on forecasts/discussion, 		  
extracts from NOAA warehouse on SRS and other activity, and    
Last 24 months CV-data, This month CV acc. to USAF  
Registration data          
Check if your CV-observations have been registered (please allow up to 24 hrs):  
https://www.cv-helios.net/helios/cv/web/datlist.htm for checking of Entries Summary
and Daily Preliminary Reports
https://www.cv-helios.net/helios/cv/web/mprpost.html
Solar Coordinates          
Daily list of Solar Ephemeris available at:  
Daily list of Solar Ephemeris    
Here you can see Today's Po, Bo, Lo, Rotation no., RA and Dec.  
Adjusted SOHO-picture on grid for Today can be found at:  
https://www.cv-helios.net/helios/cv/web/sungrid/today.jpg  
CONTRIBUTE WITH YOUR PHOTOS AND OTHER OF INTEREST!      
We would like YOU to contribute with drawings or photos from last month  
Also any other contribution that may have an interest for our observers.  
Please send by email to: cvhelios@gmail.com        
Average received to registered time: 0 day 07 hours 01 minutes
and average macrotime per registration is 26,32 seconds
CV-Helios Network
- over 44 years in solar amateur astronomy service!
There are now Entries reg. registrations made, containing Number obs. reg. CV-observations!
Last 12 months 5901 CV-observations from 40 observers originating from 15 countries
Editorial close: 15.05.2026 18:35 UTC
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