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 3               MPR no. 500               March 2023               ISSN 2535-3780
CV-Helios Network
Monthly Preliminary Report for March 2023
Solar Cycle 25: Month no. 40
Report id.: cv2303 - CV-report no.: 500
Memno. Name Country CV Obs K Obs. Tot.
CV-001 KJELL INGE MALDE NORWAY 109,3 22 1,093 9146
CV-010 FRANKY DUBOIS BELGIUM 93,1 19 0,931 9526
CV-019 ELMAR JUNKER GERMANY 82,0 1 0,820 3781
CV-023 HARTMUT BRETSCHNEIDER GERMANY 53,1 15 0,531 5761
CV-040 ROBERTO BATTAIOLA ITALY 107,0 8 1,070 2093
CV-041 JENS ROTHERMEL GERMANY 131,0 2 1,310 1407
CV-068 SVEN OVE THIMM DENMARK 69,5 13 0,695 4164
CV-077 ANDREW JOHNSTON UNITED KINGDOM 101,5 11 1,014 3586
CV-080 JAN JANSSENS BELGIUM 79,0 3 0,790 1200
CV-082 PIOTR URBANSKI POLAND 114,6 14 1,146 5378
CV-086 TOS POLAND POLAND 110,1 31 1,101 8513
CV-102 PAULO ROBERTO MOSER BRAZIL 113,3 31 1,132 2915
CV-105 ALEXEY RYBACK RUSSIA 82,1 14 0,821 3391
CV-122 VLASTISLAV FEIK CZECH REPUBLIC 76,3 15 0,763 3120
CV-135 GEMA ARAUJO SPAIN 118,7 30 1,187 7318
CV-136 FAUSTINO GARCIA SPAIN 72,9 19 0,729 3876
CV-139 JAVIER ALONSO SPAIN 111,7 22 1,117 4023
CV-151 JEFFREY CARELS BELGIUM 77,7 7 0,777 3149
CV-171 WALTER JOSE MALUF BRAZIL 146,1 10 1,461 2882
CV-181 ADAM DERDZIKOWSKI POLAND 86,5 4 0,865 1094
CV-204 STEFAN MEISTER SWITZERLAND 63,4 5 0,634 743
CV-207 ONDREJOV OBS. (AI CAS) CZECH REPUBLIC 117,3 15 1,172 3700
CV-208 JOHAN NEYS BELGIUM 104,8 5 1,048 687
CV-214 IGOR GRAGEDA MENDEZ BOLIVIA 89,1 23 0,891 1137
CV-215 ARNAUD MENGUS FRANCE 55,3 4 0,552 318
CV-219 KANDILLI OBSERVATORY TURKEY 89,4 12 0,894 816
CV-220 MICHEL FRANGEUL FRANCE 82,3 14 0,823 93
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
Totals Observers Days CV No K  
27 31 93,97 369 0,940  
Results
Date CV Obsrvrs Regions
 6 rot.
CV-USAF 6-rot.
 6 rot.
CV-6 rot. CV-13 rot.
1 88,94 18 6,22 103,86 97,99 83,54
2 92,13 16 6,23 103,93 98,18 83,49
3 115,91 11 6,26 104,00 98,41 83,55
4 85,22 9 6,28 103,78 98,43 83,57
5 133,33 9 6,30 103,90 98,55 83,69
6 150,56 9 6,34 104,29 98,65 83,88
7 174,63 8 6,37 104,35 98,65 84,11
8 129,50 8 6,40 104,50 98,57 84,34
9 135,29 7 6,44 104,65 98,61 84,69
10 114,44 9 6,47 104,90 98,72 84,97
11 113,00 10 6,51 105,13 98,98 85,26
12 94,47 15 6,55 105,38 99,19 85,52
13 69,18 11 6,55 105,65 99,25 85,65
14 69,29 14 6,57 105,30 99,05 85,72
15 61,78 18 6,58 104,79 98,69 85,72
16 29,21 14 6,58 104,09 98,03 85,68
17 31,60 15 6,57 103,47 97,32 85,54
18 53,12 17 6,54 103,15 96,83 85,24
19 84,58 12 6,54 102,87 96,65 85,12
20 96,55 11 6,53 102,76 96,53 85,05
21 92,87 15 6,52 102,27 96,39 84,97
22 110,75 12 6,51 102,05 96,38 84,94
23 95,00 10 6,51 101,70 96,34 84,82
24 116,50 12 6,53 101,52 96,55 84,78
25 149,07 14 6,55 101,71 97,02 84,94
26 139,90 10 6,59 102,00 97,37 85,05
27 127,19 16 6,62 102,61 98,07 85,24
28 141,69 13 6,64 103,34 98,92 85,46
29 131,38 8 6,68 103,73 99,66 85,67
30 95,44 9 6,70 103,78 100,05 85,98
31 47,00 9 6,70 103,77 100,56 86,30
 Totals/ 3,96 27,3 0,97 4,83 98,15 84,92
Avrgs
CV and CV observers          
 
           
CV-13 rot. per Mar 2023  
             
Latest sunspot regions developments          
   
Reg.-First-Last-Lat.-Long.-Rot.-Area-Lgth.-CV-
max.
 
Region,First date,Max.date,Last date,Lat.,Long.,Rot.,Max.mvh,Max class,Max CV 3256,17.03.23,28.03.23,30.03.23,-22,33,2268,340,FHO,51
3239,28.02.23,08.03.23,12.03.23,31,240,2268,140,HSX,10 3257,18.03.23,23.03.23,30.03.23,-27,348,2269,190,HAX,7
3242,03.03.23,07.03.23,13.03.23,10,219,2268,300,ESC,35 3260,19.03.23,22.03.23,31.03.23,23,346,2269,180,CAO,8
3243,03.03.23,05.03.23,07.03.23,18,306,2268,110,DAO,19  
3245,03.03.23,08.03.23,15.03.23,-23,195,2268,440,DHI,52  
3249,07.03.23,08.03.23,16.03.23,-11,142,2268,150,HAX,7  
   
   
             
:Product: Weekly Highlights and Forecasts        
Highlights of Solar and Geomagnetic Activity  
03 - 09 April 2023 http://services.swpc.noaa.gov/text/weekly.txt
   
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. Modelling  
indicated a miss, however a glancing blow could not be ruled out  
early on 12 Apr.   
   
No proton events were observed at geosynchronous orbit.  
   
   
   
   
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.        
Monthly graph          
The above graphic show a complete daily averaged latitude
hemisphere distribution for all sunspotregions for years 1874-2022.
Highlights March 2023