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 4               MPR no. 501               April 2023               ISSN 2535-3780
CV-Helios Network
Monthly Preliminary Report for April 2023
Solar Cycle 25: Month no. 41
Report id.: cv2304 - CV-report no.: 501
Memno. Name Country CV Obs K Obs. Tot.
CV-001 KJELL INGE MALDE NORWAY 95,3 26 1,185 9172
CV-010 FRANKY DUBOIS BELGIUM 79,3 26 0,987 9552
CV-019 ELMAR JUNKER GERMANY 59,3 4 0,737 3785
CV-023 HARTMUT BRETSCHNEIDER GERMANY 51,5 15 0,640 5776
CV-040 ROBERTO BATTAIOLA ITALY 85,2 10 1,059 2103
CV-068 SVEN OVE THIMM DENMARK 53,5 24 0,666 4188
CV-077 ANDREW JOHNSTON UNITED KINGDOM 57,3 19 0,713 3605
CV-080 JAN JANSSENS BELGIUM 54,0 4 0,671 1204
CV-082 PIOTR URBANSKI POLAND 88,6 24 1,102 5403
CV-086 TOS POLAND POLAND 85,7 30 1,066 8543
CV-091 GRZEGORZ DALEK POLAND 86,7 18 1,078 4713
CV-102 PAULO ROBERTO MOSER BRAZIL 80,9 25 1,006 2940
CV-105 ALEXEY RYBACK RUSSIA 90,4 21 1,124 3412
CV-122 VLASTISLAV FEIK CZECH REPUBLIC 53,6 12 0,666 3132
CV-135 GEMA ARAUJO SPAIN 97,8 30 1,216 7348
CV-136 FAUSTINO GARCIA SPAIN 60,2 21 0,749 3897
CV-139 JAVIER ALONSO SPAIN 81,4 15 1,012 4038
CV-151 JEFFREY CARELS BELGIUM 61,5 12 0,765 3161
CV-171 WALTER JOSE MALUF BRAZIL 130,6 18 1,624 2900
CV-181 ADAM DERDZIKOWSKI POLAND 77,2 10 0,960 1104
CV-204 STEFAN MEISTER SWITZERLAND 75,8 6 0,943 749
CV-207 ONDREJOV OBS. (AI CAS) CZECH REPUBLIC 87,4 12 1,087 3712
CV-208 JOHAN NEYS BELGIUM 92,6 10 1,151 697
CV-214 IGOR GRAGEDA MENDEZ BOLIVIA 84,0 27 1,044 1164
CV-215 ARNAUD MENGUS FRANCE 68,5 6 0,852 324
CV-219 KANDILLI OBSERVATORY TURKEY 71,4 14 0,888 830
CV-220 MICHEL FRANGEUL FRANCE 68,8 18 0,855 111
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
             
Totals Observers Days CV No K  
27 30 76,99 457 0,957  
Results
Date CV Obsrvrs Regions
 6 rot.
CV-USAF 6-rot.
 6 rot.
CV-6 rot. CV-13 rot.
1 26,00 13 6,69 103,71 100,21 86,41
2 24,08 13 6,70 103,73 100,45 86,57
3 40,44 18 6,70 103,84 100,47 86,65
4 35,26 19 6,70 103,90 100,38 86,70
5 37,67 18 6,68 103,91 100,43 86,69
6 43,83 18 6,67 103,87 100,28 86,66
7 48,69 13 6,65 103,87 100,50 86,48
8 48,56 18 6,63 103,77 100,39 86,23
9 34,47 15 6,62 103,68 100,09 85,96
10 76,35 17 6,61 104,01 100,18 85,80
11 89,50 12 6,60 104,27 100,27 85,66
12 100,46 13 6,62 104,65 100,70 85,50
13 113,50 12 6,65 105,15 101,16 85,39
14 156,47 15 6,66 105,52 101,90 85,38
15 142,29 14 6,69 105,97 102,42 85,38
16 140,63 16 6,71 106,55 103,04 85,39
17 141,73 15 6,73 107,12 103,45 85,33
18 116,92 12 6,73 107,49 103,73 85,28
19 88,00 17 6,74 107,57 103,90 85,35
20 90,11 19 6,74 107,52 103,94 85,51
21 89,42 19 6,74 107,60 104,07 85,67
22 84,47 17 6,74 107,66 104,25 85,83
23 81,67 18 6,75 107,77 104,46 85,96
24 69,14 14 6,77 107,77 104,58 85,96
25 53,42 12 6,79 107,51 104,55 85,92
26 82,79 14 6,80 107,39 104,60 85,95
27 88,55 11 6,82 107,18 104,51 86,04
28 95,00 12 6,83 107,20 104,58 86,07
29 99,58 12 6,82 107,13 104,71 86,19
30 88,48 21 6,83 107,39 104,88 86,34
             
 Totals/ 3,96 27,3 0,97 4,83 102,44 85,94
Avrgs
CV and CV observers          
 
           
CV-13 rot. per Apr 2023  
             
Latest sunspot regions developments          
   
Reg.-First-Last-Lat.-Long.-Rot.-Area-Lgth.-CV-
max.
 
A total of 552 regions this cycle per mid Apr. 2023 (267 regions North and 285 regions South).  3273,09.04.23,10.04.23,16.04.23,9,115,2269,120,DSO,25
At the same time solar cycle 24 produced 446 regions. 3279,12.04.23,13.04.23,24.04.23,-20,36,2269,230,DAI,22
00.01.1900 3280,13.04.23,15.04.23,17.04.23,-8,116,2269,240,DSI,28
Region,First date,Max.date,Last date,Lat.,Long.,Rot.,Max.mvh,Max class,Max CV  
3270,02.04.23,03.04.23,08.04.23,-23,238,2269,140,DAI,22  
3272,06.04.23,09.04.23,19.04.23,-22,103,2269,280,EAI,23  
   
   
             
:Product: Weekly Highlights and Forecasts        
Highlights of Solar and Geomagnetic Activity  
08 - 14 May 2023 http://services.swpc.noaa.gov/text/weekly.txt
   
Solar activity reached high levels on 09 May and moderate levels on  
08, 10, and 11 May. In total, nine M-class flares were observed from  
three sunspot regions this period. Region 3296 (N15, L=140,  
class/area=Ekc/290 on 10 May) was the most active sunspot region and  
produced two R2 (Moderate) events and four R1 (Minor) events. Region  
3294 (S07, L=125, class/area=Cso/130 on 11 May) produced two R1  
events and Region 3293 (N13, L=149, class/area=Dhc/290 on 03 May)  
produced a single R1 event. Two solar energetic particle (SEP)  
events associated with this weeks activity were observed as were  
multiple Earth-directed CMEs; see below for more information.   
   
The greater than 10 MeV proton flux reached S1 (Minor) storm levels  
in two distinct SEP events. The first SEP event followed a pair of  
long-duration M1 flares (at 07/2234 UTC and 07/2323 UTC) from Region  
3296 and reached S1 levels at 08/1240 UTC, reached a peak of 38 pfu  
at 09/0150 UTC, and ended at 09/1235 UTC. The second SEP event  
followed an M4 flare at 09/1858 UTC from Region 3296 and reached S1  
Solar activity is expected to be low to moderate throughout the  
outlook period.   
   
No proton events are expected at geosynchronous orbit.  
   
The greater than 2 MeV electron flux at geosynchronous orbit is  
expected to reach high levels on 23 May-02 Jun, with normal to        
Monthly graph          
The above graphic show a complete daily 13 rot. averaged Solar wind speed for the last year.
Highlights April 2023          
   
The sun has been crackling with lots ofnew regions and with it lots of activity last month.  
   
Solar activity has been several times at high levels in April 2023.  
The CV-I 6 rot. average is now very close to the max CV-I 6-rot. For max cycle 24! In fact:  
On 24 March 2014 the highest average was achieved and per 30 Apr 2023 we are now less that 3,5 CV.units away!
Regarding the solar Flux, the maximum value 6-rot. for cycle 24 was 155,1 pfu. on max date 4 April 2014.  
Solar cycle 25 passed that value already on 30 April 2023 and is still rising!  
   
A total of 552 regions this cycle per mid Apr. 2023 (267 regions North and 285 regions South).   
At the same time solar cycle 24 produced 446 regions.  
   
Region,First date,Max.date,Last date,Lat.,Long.,Rot.,Max.mvh,Max class,Max CV  
3270,02.04.23,03.04.23,08.04.23,-23,238,2269,140,DAI,22  
3272,06.04.23,09.04.23,19.04.23,-22,103,2269,280,EAI,23  
3273,09.04.23,10.04.23,16.04.23,9,115,2269,120,DSO,25  
3279,12.04.23,13.04.23,24.04.23,-20,36,2269,230,DAI,22  
3280,13.04.23,15.04.23,17.04.23,-8,116,2269,240,DSI,28  
3281,13.04.23,14.04.23,23.04.23,-23,17,2269,350,DKO,43  
3282,14.04.23,16.04.23,24.04.23,11,24,2269,530,EKI,47  
3285,21.04.23,27.04.23,03.05.23,-17,272,2270,240,EKI,47  
3288,25.04.23,30.04.23,03.05.23,-23,267,2270,420,,  
3289,25.04.23,30.04.23,04.05.23,20,215,2270,220,,  
   
   
We reckon there have passed 1242 days (solar flux 1279 days) of the new cycle by this issue.  
   
April continue production of lots of large regions and major solar flares and CME's too!  
Solar Max.: Our latest and final prediction to occur late July 2025, earliest possible may be April 2025.  
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 SDO/HMI NOAA gov Highlights April 2023    
   
   
   
 
 
   
   
   
   
   
   
   
   
   
     
   
   
   
   
   Left: The top CV-I day of April 2023: SOHO image "hmiigr" 14 Apr 2023.  
  Right: Cycles cy24/cy25 progress compared.  
Awards this month         0
none
 
             
New members:
    Welcome to:  
 
   
 CV-221 JON ADAMS, England 13 Apr 2023 Welcome to our New Member!  
   
   
      We are now 49 active members (last 12 mo.)
Solar Coordinates New from April 2020        
Daily list of Solar Ephemeris available at:  
Daily list of Solar Ephemeris and SDO on grid  
Here you can see Today's Po, Bo, Lo, Rotation no., RA and Dec. and adjusted SOHO-picture on grid.  
Calculating CV          
For your convenience and security, use the mif2021,   
https://www.cv-helios.net/mif2021.xlsx  
the Monthly Input Form, which you can use for all of your next reportings!  
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 about 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,   
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  
https://www.cv-helios.net/helios/cv/web/cvobsmonth.htm  
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          
Please check out www.cv-helios.net/cvrep2.html for updates of files!        
SUBMISSIONS OF CV-OBSERVATIONS  
Log on to:  
https://www.cv-helios.net/observations/index.html Classification Help  
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MPR issue 15th of proceeding month 2000 UTC.  Good luck CV-observing!  
Average received to registered time: 0 day 11 hours 20 minutes
and Average macrotime used for one registration is 18,82 seconds
CV-Helios Network
- over 41 years in solar amateur astronomy service!
There are now Entries reg.: 12902 entries registered
containing 207995 CV-observations!
Last 12 months 5738 CV-observations from 39 observers originating from 17 countries
Editorial close: 15.05.2023 14:18 UTC
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