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 44 Number 4               MPR no. 513               April 2024               ISSN 2535-3780
CV-Helios Network
Monthly Preliminary Report for April 2024
Solar Cycle 25: Month no. 53
Report id.: cv2404 - CV-report no.: 513
Memno. Name Country CV Obs K Obs. Tot.
CV-001 KJELL INGE MALDE NORWAY 153,1 24 1,185 9413
CV-010 FRANKY DUBOIS BELGIUM 99,5 30 0,827 9806
CV-019 ELMAR JUNKER GERMANY 100,7 13 1,248 3884
CV-023 HARTMUT BRETSCHNEIDER GERMANY 71,3 24 0,608 6021
CV-040 ROBERTO BATTAIOLA ITALY 138,1 7 1,181 2168
CV-068 SVEN OVE THIMM DENMARK 84,5 19 0,608 4358
CV-077 ANDREW JOHNSTON UNITED KINGDOM 110,1 18 0,760 3756
CV-080 JAN JANSSENS BELGIUM 101,5 2 0,659 1235
CV-082 PIOTR URBANSKI POLAND 133,5 25 1,126 5638
CV-102 PAULO ROBERTO MOSER BRAZIL 95,1 28 0,857 3259
CV-105 ALEXEY RYBACK RUSSIA 124,7 11 1,256 3564
CV-122 VLASTISLAV FEIK CZECH REPUBLIC 107,6 11 1,083 3247
CV-135 GEMA ARAUJO SPAIN 167,1 29 1,546 7704
CV-136 FAUSTINO GARCIA SPAIN 94,1 19 0,705 4058
CV-139 JAVIER ALONSO SPAIN 101,6 16 0,942 4247
CV-151 JEFFREY CARELS BELGIUM 105,2 18 0,941 3321
CV-171 WALTER JOSE MALUF BRAZIL 213,5 20 1,973 3144
CV-181 ADAM DERDZIKOWSKI POLAND 71,4 12 0,853 1236
CV-204 STEFAN MEISTER SWITZERLAND 86,5 4 1,004 839
CV-207 ONDREJOV OBS. (AI CAS) CZECH REPUBLIC 123,4 27 1,082 3925
CV-208 JOHAN NEYS BELGIUM 82,9 7 0,929 801
CV-214 IGOR GRAGEDA MENDEZ BOLIVIA 140,0 25 0,998 1460
CV-215 ARNAUD MENGUS FRANCE 80,0 5 0,708 389
CV-219 KANDILLI OBSERVATORY TURKEY 107,2 24 0,976 1105
CV-220 MICHEL FRANGEUL FRANCE 106,3 16 0,777 233
CV-222 MILENA NIEMCZYK POLAND 66,9 18 0,621 124
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
Totals Observers Days CV No K  
26 30 110,22 452 0,979  
Month Results for April 2024
Date CV Obsrvrs Regions
 6 rot.
CV-USAF 6-rot.
 6 rot.
CV-6 rot. CV-13 rot.
1 30,81 16 6,93 96,42 100,09 112,55
2 10,33 15 6,91 96,32 99,76 112,25
3 19,09 10 6,91 96,32 99,90 111,95
4 25,38 12 6,93 96,39 99,93 111,66
5 43,57 13 6,95 96,48 100,09 111,40
6 51,79 13 6,96 96,68 100,25 111,17
7 54,10 19 6,98 97,02 100,16 110,97
8 59,87 14 6,98 97,48 100,32 110,93
9 55,60 14 6,98 97,84 100,40 110,88
10 58,93 15 6,98 98,02 100,56 110,82
11 89,12 16 6,99 98,18 100,71 110,85
12 95,85 12 6,99 98,07 100,85 110,93
13 101,00 18 7,00 98,24 101,01 111,04
14 124,32 18 7,02 98,27 101,23 111,26
15 148,23 13 7,04 98,47 101,49 111,44
16 181,62 13 7,07 99,15 101,91 111,67
17 199,19 16 7,10 99,99 102,76 111,96
18 195,75 11 7,16 100,84 103,46 112,17
19 192,08 12 7,30 102,79 104,23 112,46
20 210,92 13 7,37 103,77 104,89 112,74
21 199,94 18 7,43 104,61 105,81 112,97
22 229,40 14 7,50 105,54 106,82 113,05
23 259,25 15 7,56 106,84 108,20 113,30
24 239,36 11 7,63 107,89 108,85 113,47
25 184,21 14 7,68 108,32 109,34 113,60
26 109,23 13 7,71 108,37 109,49 113,55
27 100,39 17 7,74 108,70 109,86 113,49
28 82,94 16 7,78 109,12 109,92 113,31
29 78,78 17 7,80 109,49 110,06 113,12
30 77,53 16 7,82 109,71 110,20 112,95
             
 Totals/ 116,95 14,5 7,24 101,51 103,75 112,13
Avrgs
CV and CV observers          
 
 
CV-13 rot. per Apr 2024  
   
   
   
   
   
   
   
   
   
   
   
   
             
:Product: Weekly Highlights and Forecasts        
Highlights of Solar and Geomagnetic Activity  
06 - 12 May 2024  
   
Solar activity was high. The bulk of the activity came from Region Click on link below  
3664 (S17, L=347, Fkc/BGD on 10 May). This region was resonsible for to read the full weekly  
41 M-class and 9 X-class flares accounting for approximately 72% of http://services.swpc.noaa.gov/text/weekly.txt
the 74 energetic events observed during the week. It was also  
responsible for several CMEs, On Monday, 6 May the region had grown  
to an Ekc/BGD group, having been a numbered region since 01 May. By  
the 8th, it had more than doubled in size to 1200  
microhemispheres.and had produced its first three X-class flares. By National Oceanic and Atmospheric Administration logo
 
10 May, it had doubled again in size to 2400 microhemispheres and  
produced a total of 6 X-class flares.   
   
Flares and CMEs noted included the following from Region 3664, with  
flare maximum time and particulars followed by the time the CME was  
first visible in C2 imagery:   
   
   
   
   
   
   
   
   
   
             
Progress Solar Cycle no. 25          
Graphic show CV-Int. levels cycle 25 compared to same stage cycles 21-24 per end Mar 2024.
Highlights April 2024          
   
The solar activity in April 2024 was a nice upswing in solar activity.  
Though many smaller regions, the flare activity has been fairly high.  
On the 16th April we saw the 10.000th region (3644) since 1981 August 15, CV-day no. 1.  
   
The 6 rot. average for solar cycle 25 approaches cycle 23 more and more,  
and 13 rot. average is not far behind either.  
   
A total of 927 regions this cycle per end May 2024 (462 regions North and 465 regions South).   
At the same time solar cycle 24 produced 699 regions .(302 north and 397 south).  
   
Latest prediction indicate maximum in August 2025. Norhtern hemisphere may even have had its maximum already.  
We see a fairly flat maximum where spring and summer 2025 may have max.-activity. Updates will come.  
   
We reckon there have passed 1633 days of the new cycle by this issue on 15 May 2024.  
   
There is a continuous massive production of smaller regions and May shoed another supergroup!  
The appearance of region 3664 and heavy flare activity and radio storms are promising!  
   
Solar Flux onset occurred 30 September 2022.  
   
Please remember you are always welcome to contribute with drawings and photos!  
   
Need for new members!  Do you know any amateur solar astronomer that know or like to learn classifications?
Then please pass the information about CV-Helios Network's work and contact cvhelios@gmail.com  
   
Supergroups-catalogue:  
CV-Helios Network is currently working on a catalogue with drawings or photos  
of the, currently 860 sunspot regions that exceeded 1000 mvh  
in the period of RGO-USAF tables, that is, from 1874 to the current year.  
Drawings or photos will be collected from the archives of wellknown different observatories!  
Hopefully this catalogue will be published in 2025!  Stay tuned!  
   
   
   
 
   
             
Pictures from last month - Observer contributions, etc.        
  Photo courtesy: https://mars.nasa.gov/mars2020/multimedia/raw-images/ Highlights April 2024    
   
   
 
 
   
   
   
   
   
   
   
   
   
   
     
   
   
   
   
   
   
Awards this month         1
Award no.: 164 to CV-023 HARTMUT BRETSCHNEIDER date 05 April 2024 milestone 6000 CV-obs.! CONGRATULATIONS!
 
 
         
 
New members:   Welcome to:    
             
             
             
             
      We are now 52 active members (last 12 mo.)
Sunspot regions of April 2024          
   
Region,First date,days,Lat.,Long.,Rot.,Max class,Max CV Region,First date,days,Lat.,Long.,Rot.,Max class,Max CV
3625,31.03.24,3,12,174,2282,DAI,22 3643,15.04.24,12,-13,211,2283,EAC,32  
3626,01.04.24,4,12,130,2282,CAO,8 3644,16.04.24,14,13,182,2283,DSO,25  
3627,02.04.24,4,10,25,2282,AXX,1 3645,17.04.24,10,-9,224,2283,DKI,46  
3628,03.04.24,13,8,2,2282,CHO,41 3646,17.04.24,13,21,179,2283,DAI,22  
3629,04.04.24,6,6,71,2282,DAI,22 3647,18.04.24,9,-13,220,2283,DAC,31  
3630,05.04.24,3,-11,68,2282,BXI,3 3648,18.04.24,7,18,196,2283,DAI,22  
3631,05.04.24,3,11,52,2282,AXX,1 3649,19.04.24,5,16,244,2283,BXI,3  
3632,05.04.24,5,26,359,2283,CAO,8 3650,19.04.24,7,-11,200,2283,CAI,9  
3633,06.04.24,13,-8,320,2283,DSI,28 3651,19.04.24,3,13,192,2283,BXO,2  
3634,08.04.24,11,26,313,2283,DHI,52 3652,20.04.24,10,14,165,2283,DAO,19  
3635,10.04.24,12,22,286,2283,CSI,12 3653,20.04.24,4,3,133,2283,AXX,1  
3636,11.04.24,13,-21,250,2283,CSO,11 3654,21.04.24,12,-8,134,2283,FKC,57  
3637,13.04.24,11,-13,231,2283,CSO,11 3655,21.04.24,12,-27,130,2283,DAO,19  
3638,13.04.24,13,-18,228,2283,CAO,8 3656,21.04.24,6,-12,119,2283,HSX,10  
3639,14.04.24,14,29,220,2283,EKI,47 3657,22.04.24,7,-13,146,2283,BXO,2  
3640,14.04.24,1,21,226,2283,AXX,1 3658,24.04.24,5,-22,184,2283,DRO,13  
3641,14.04.24,9,10,275,2283,DAO,19 3659,25.04.24,2,-13,105,2283,AXX,1  
3642,15.04.24,2,18,283,2283,BXO,2 3660,27.04.24,3,10,49,2283,HSX,10  
             
             
Progress and Predictions for Solar Cycle 25        
   
   
 
 
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
For larger views all three graphs are linked  
   
 
 
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
             
             
140 years: Overlay of butterfly wings for solar cycles 12 to 24 (1879-2019)