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 2               MPR no. 511               February 2024               ISSN 2535-3780
CV-Helios Network
Monthly Preliminary Report for February 2024
Solar Cycle 25: Month no. 51
Report id.: cv2402 - CV-report no.: 511
Memno. Name Country CV Obs K Obs. Tot.
CV-001 KJELL INGE MALDE NORWAY 123,2 14 1,078 9375
CV-010 FRANKY DUBOIS BELGIUM 97,3 12 0,921 9759
CV-023 HARTMUT BRETSCHNEIDER GERMANY 92,1 14 0,820 5977
CV-040 ROBERTO BATTAIOLA ITALY 191,0 1 1,515 2158
CV-068 SVEN OVE THIMM DENMARK 54,8 12 0,508 4329
CV-077 ANDREW JOHNSTON UNITED KINGDOM 99,0 10 0,946 3721
CV-080 JAN JANSSENS BELGIUM 111,0 1 1,068 1232
CV-082 PIOTR URBANSKI POLAND 104,4 9 1,010 5592
CV-086 TOS POLAND POLAND 124,7 29 1,109 8843
CV-091 GRZEGORZ DALEK POLAND 112,6 12 0,966 4823
CV-102 PAULO ROBERTO MOSER BRAZIL 106,0 26 0,980 3205
CV-105 ALEXEY RYBACK RUSSIA 109,8 16 1,027 3537
CV-122 VLASTISLAV FEIK CZECH REPUBLIC 96,6 8 0,890 3223
CV-135 GEMA ARAUJO SPAIN 136,8 27 1,227 7644
CV-136 FAUSTINO GARCIA SPAIN 95,8 15 0,888 4039
CV-139 JAVIER ALONSO SPAIN 136,5 22 1,169 4207
CV-151 JEFFREY CARELS BELGIUM 104,2 5 0,982 3290
CV-158 JACQUES VAN DELFT SOUTH AFRICA 87,6 9 0,885 364
CV-171 WALTER JOSE MALUF BRAZIL 127,2 11 1,298 3103
CV-181 ADAM DERDZIKOWSKI POLAND 92,3 3 0,902 1214
CV-204 STEFAN MEISTER SWITZERLAND 104,0 1 0,825 831
CV-206 TADEUSZ FIGIEL POLAND 90,0 2 1,050 368
CV-207 ONDREJOV OBS. (AI CAS) CZECH REPUBLIC 114,8 10 1,057 3875
CV-208 JOHAN NEYS BELGIUM 86,5 2 0,909 786
CV-214 IGOR GRAGEDA MENDEZ BOLIVIA 102,2 20 0,933 1411
CV-215 ARNAUD MENGUS FRANCE 152,0 2 1,110 378
CV-219 KANDILLI OBSERVATORY TURKEY 102,9 22 0,929 1060
CV-220 MICHEL FRANGEUL FRANCE 113,0 4 0,940 201
CV-222 MILENA NIEMCZYK POLAND 52,7 3 0,647 93
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
Totals Observers Days CV No K  
29 29 107,62 322 0,986  
Month Results for February 2024
Date CV Obsrvrs Regions
 6 rot.
CV-USAF 6-rot.
 6 rot.
CV-6 rot. CV-13 rot.
1 86,23 13 7,16 96,24 102,38 111,85
2 90,90 9 7,16 96,49 102,35 111,66
3 126,09 11 7,16 96,61 102,53 111,57
4 152,27 11 7,18 96,85 102,81 111,49
5 147,00 10 7,21 96,94 102,97 111,52
6 133,29 7 7,23 97,16 102,91 111,57
7 126,63 8 7,26 97,40 103,02 111,57
8 120,57 7 7,29 97,35 103,18 111,52
9 99,63 8 7,30 97,48 103,17 111,42
10 111,45 11 7,32 97,63 103,24 111,39
11 131,63 8 7,33 97,80 103,38 111,40
12 151,08 12 7,34 98,18 103,77 111,51
13 146,31 13 7,35 98,49 104,33 111,59
14 151,63 8 7,35 99,21 104,90 111,61
15 150,00 8 7,37 99,78 105,50 111,62
16 99,50 12 7,37 99,87 105,83 111,58
17 67,70 10 7,36 99,85 105,85 111,53
18 82,07 15 7,35 100,07 105,68 111,54
19 92,30 10 7,31 99,41 105,74 111,60
20 62,75 12 7,30 99,13 105,61 111,55
21 63,83 11 7,26 98,59 105,07 111,44
22 67,58 12 7,21 98,23 104,59 111,39
23 98,38 13 7,20 98,21 104,25 111,32
24 107,53 17 7,20 98,15 104,23 111,23
25 103,89 18 7,20 98,07 104,17 111,12
26 115,38 13 7,20 98,16 104,38 111,10
27 111,15 13 7,20 98,40 104,74 111,07
28 113,44 9 7,21 98,71 105,00 111,07
29 131,10 10 7,20 98,49 104,99 111,11
             
             
 Totals/ 3,96 27,3 0,97 4,83 104,16 111,45
Avrgs
CV and CV observers          
 
 
CV-13 rot. per Feb 2024  
   
   
   
   
   
   
   
   
   
   
   
   
             
:Product: Weekly Highlights and Forecasts        
Highlights of Solar and Geomagnetic Activity  
04 - 10 March 2024  
   
Solar activity was at low to moderate levels. Region 3599 (S13, Click on link below  
L=067, class/area Dai/220 on 09 Mar) produced two M-class flares. to read the full weekly  
The first was an impulsive M1.3/Sf at 08/2126 UTC. The second was an http://services.swpc.noaa.gov/text/weekly.txt
M7.4 flare at 10/1213 UTC with an associated 340 sfu Tenflare, a  
Type II radio sweep (714 km/s), a weak Castelli U radio signature,  
and a CME directed off the NW limb at 10/1248 UTC. Initial modelling  
of the CME indicated no Earth-directed component, however further  
analysis is on-going. A faint partial halo was observed beginning at National Oceanic and Atmospheric Administration logo
 
10/1812 UTC in coronagraph imagery, likely related to a C6.9/1f  
flare at 10/1538 UTC from Region 3599. Initial analysis showed a  
glancing blow around midday on 13 Mar.   
   
No proton events were observed at geosynchronous orbit. A slight  
enhancement to near 0.4 pfu was observed following the M7.4 flare at  
10/1213 UTC.   
   
   
Solar activity is expected to be at very low to low levels with a  
chance for M-class (R1-R2/Minor-Moderate) flares on 11-14 Mar due  
primarily to the flare potential of Region 3599. Quiet to unsettled  
levels are expected on 15-26 Mar. On 27 Mar-06 Apr, a chance for  
M-class flares is once again likely as Region 3599 returns to the  
visible disk.   
             
Progress Solar Cycle no. 25          
Graphic show CV-Int. levels cycle 25 compared to same stage cycles 21-24 per end Feb 2024.
Highlights February 2024          
   
The solar activity in February 2024 is going slowly and though nice flare activity, no large groups  
except for region 3586 which was the largest one since 2014.  Other onnly modest sizes.  
   
The 6 rot. average was 105,9 CV-units by end February,  
but the 13 rot. average was 110,2 CV-units by last month end.  
Report-end this MPR 511 for February show we may still approach cycle 23, though 20,1% behind.  
A total of 756 regions this cycle per end March 2024 (375 regions North and 381 regions South).   
At the same time solar cycle 24 produced 657 regions .(276 north and 381 south)  
   
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 (though it may happen a bit earlier). Updates will come.  
   
We reckon there have passed 1572 days of the new cycle by this issue on 15 Mar 2024.  
   
There is a continued production of smaller regions but soon expect more active periods!  
The appearance of region 3576 and heavy flare activity show some very active periods to come!  
   
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 859, 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 2024 or 2025!  Stay tuned!  
   
   
   
   
 
   
             
Pictures from last month - Observer contributions, etc.        
  Highlights February 2024    
  Photo courtesy: Thanks to CV-222 Milena Niemczyk, Poland  
   
   
 
 
   
   
   
   
   
   
   
   
   
     
   
   
   
Click on image to see a larger view.  
Photo above from left February 25, 2024. All members are free to participate in sending in photos!  
   
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New members:   Welcome to:    
             
             
             
             
      We are now 52 active members (last 12 mo.)
Sunspot regions of February 2024          
   
Region,First date,days,Lat.,Long.,Rot.,Max class,Max CV Region,First date,days,Lat.,Long.,Rot.,Max class,Max CV
3567,30.01.24,7,18,129,2280,DAI,22 3583,10.02.24,9,9,7,2280,FKO,45  
3570,01.02.24,5,-4,118,2280,DRO,13 3584,10.02.24,10,-15,337,2281,CAO,8  
3571,01.02.24,12,-17,104,2280,CSO,11 3585,13.02.24,3,14,308,2281,HAX,7  
3572,01.02.24,6,-12,147,2280,HSX,10 3586,14.02.24,12,27,282,2281,HSX,10  
3573,01.02.24,6,22,159,2280,CSO,11 3587,15.02.24,4,-21,305,2281,CRO,5  
3574,01.02.24,10,16,95,2280,DAO,19 3588,15.02.24,1,-3,312,2281,BXO,2  
3575,02.02.24,6,-37,177,2280,DKC,55 3589,15.02.24,3,-7,34,2280,BXI,3  
3576,03.02.24,13,-16,57,2280,FKC,57 3590,18.02.24,12,18,223,2281,FKC,57  
3577,05.02.24,5,24,93,2280,BXO,2 3591,23.02.24,14,-36,160,2281,HSX,10  
3578,05.02.24,4,-4,47,2280,CRO,5 3592,23.02.24,8,-13,165,2281,DSO,25  
3579,07.02.24,6,-11,40,2280,HAX,7 3593,23.02.24,1,-7,305,2281,BXO,2  
3580,08.02.24,3,22,126,2280,HAX,7 3594,23.02.24,8,5,169,2281,CAO,8  
3581,08.02.24,12,-21,6,2280,HSX,10 3596,26.02.24,10,19,135,2281,CAO,8  
3582,10.02.24,8,6,34,2280,DAI,22 3597,28.02.24,3,7,155,2281,BXO,2  
   
   
   
   
             
             
Discovering activities in solar cycles from 1610 to 2023