AAVSO HOME > observing > programs > solar > bulletin > nov 04
 
 
 
Observing
Observing Programs
  Visual
  CCD
  Exoplanet Transit Search
  High Energy Network
  Photoelectric (PEP)
  Infrared Photometry
  Supernova Search
  Nova Search
  Eclipsing Binary
  RR Lyrae
  Sunspots and SID
  Observing Campaigns
Observing Aids
Submit Observations
Charts
 
Main sections of web
The AAVSO
Variable Stars
Observing
Access Data
Publications
Support
Education and Outreach
 
Pick a star

Create a light curve
Recent Observations
Find charts
VSX      
 

Solar Bulletin, November 2004

Solar Bulletin

THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS - SOLAR COMMITTEE
Carl E. Feehrer, Editor
9 Gleason Rd.
Bedford, MA 01730		Email: cfeehrer@hotmail.com

ISSN 0271-8480
Volume 60 Number 11November 2004
Table I. Mean Sunspot Numbers for November 2004
[boldface = maximum, minimum]		Table II. November Observers
Day N Raw Mean Ra
1 25 106 79
2 21 121 81
3 29 95 70
4 29 79 60
5 34 82 61
6 40 97 71
7 37 93 68
8 26 88 62
9 31 76 55
10 27 49 35
11 24 49 36
12 26 57 43
13 33 61 47
14 35 71 53
15 24 59 45
16 28 63 45
17 26 61 43
18 27 49 36
19 22 46 33
20 24 49 35
21 28 36 28
22 21 40 31
23 26 41 30
24 28 51 39
25 24 51 38
26 28 53 40
27 26 55 40
28 22 46 32
29 29 41 32
30 26 46 35
31 --- --- ---
Means:27.563.746.7
No. of Observers: 57
No. of Observations: 826

Reporting Addresses

Sunspot Reports -- email: solar@aavso.org

postal mail: AAVSO, 25 Birch St. Cambridge, MA 02138
FAX (AAVSO): (617) 354-0665

SID Solar Flare Reports -- email: noatak@aol.com

postal mail: Mike Hill 114 Prospect St. Marlboro, MA 01752
10 AAP P.Abbott
27 ARAG G.Araujo
4 ARE R.Allessi
8 BARH H.Barnes
6 BATR R.Battaiola
8 BEB R.Berg
9 BERJ J.Berdejo
12 BMF M.Boschat
8 BOSB B.Bose
26 BRAB B.Branchett
25 BRAR R.Branch
24 BROB R.Brown
3 CAMP P.Cambell
30 CHAG G.Morales
13 CKB B.Cudnik
12 CLZ L.Corp
9 COMT T.Compton
29 CR T.Cragg
24 DEJV J.van Delft
5 DGP G.Dyck
2 DPP P.dePonthiere
20 DRAJ J.Dragesco
11 DUBF F.Dubois
10 FEEC C.Feehrer
12 FERJ J.Fernandez
14 FLET T.Fleming
25 FUJK K.Fujimori
9 HAYK K.Hay
5 HRUT T.Hrutkay
18 JAMD D.James
17 KAPJ J.Kaplan
26 KNJS J&S Knight
12 KROL L.Krozel
13 LARJ J.Larriba
21 LEVM M.Leventhal
5 MARE E.Mariani
22 MARJ J.Maranon
24 MCE E.Mochizuki
12 MEU E.Mason
17 MMI M.Moeller
20 OBSO IPS Observatory
6 RICE E.Richardson
22 RITA A.Ritchie
14 SCGL G.Schott
6 SIMC C.Simpson
4 STEF G.Stefanopoulis
9 STEM G.Stemmler
20 STQ N.Stoikidis
23 SUZM M.Suzuki
17 SZUM M.Szulc
17 TESD D.Teske
12 THR R.Thompson
12 TJV J.Temprano
12 URBP P.Urbanski
13 VARG A.Vargas
10 WILW W.Wilson
22 YESH H.Yesilyaprak

Table III. Means of Raw Group Counts (RG) and Ratios of Spots to Groups (S:G) in November 2004
Ratios

Figure 1
Click image to enlarge.
Fig. 1. 10 cm Solar Flux and American Relative Sunspot Numbers (Ra) for November 2004
(10cm Source: http://www.drao.nrc.ca/icarus)

Figure 2
Click image to enlarge.
Fig.2 Smoothed Mean Sunspot Numbers (Waldmeier method) from January 2000 to May 2004.

Michael Hill, SID Analyst
114 Prospect St
Marlborough, MA 01752 USA
noatak@aol.com

Sudden Ionospheric Disturbances (SID) Recorded During November 2004

(Analysis performed by Michael Hill, SID Analyst)
Date Max Imp Date Max Imp Date Max Imp
041101 0704 2 041105 1921 2+ 041109 0629 2
041102 0145 1 041106 0029 1 041109 0741 1-
041102 0943 1+ 041106 0150 2 041109 0747 2
041102 0949 1+ 041106 0657 1 041109 0923 1-
041102 1400 1 041106 1432 1 041109 1053 1-
041103 0132 1+ 041106 1548 1- 041109 1435 2+
041103 0336 2+ 041106 1600 1+ 041109 1715 2
041103 0902 1- 041106 1608 1+ 041109 1802 1
041103 0909 1 041106 1656 1- 041110 0211 2
041103 1348 1- 041106 1714 1+ 041110 0734 1
041103 1547 2 041106 1953 2 041110 0814 2
041103 1642 1 041106 2101 1 041112 0955 2
041103 1654 1- 041107 0146 1+ 041118 1457 1-
041103 1818 2+ 041107 0419 2 041119 0051 1-
041103 1827 3 041107 0452 1+ 041119 0514 2+
041104 0904 2 041107 0801 1 041123 0852 1+
041104 2059 2 041107 1003 1+ 041123 1507 1
041104 2209 2+ 041107 1406 1+ 041124 0759 1+
041105 0555 1+ 041107 1513 1 041124 0834 2
041105 1016 1 041107 1554 2 041124 1721 1-
041105 1129 1+ 041107 1605 1+ 041124 1844 1-
041105 1635 1- 041107 1633 3 041129 0144 1
041105 1721 2 041108 0838 1- 041130 0655 2+
041105 1825 1+ 041108 1435 1-      
041105 1902 1- 041108 1547 2      


Importance rating: Duration -1: <191: 19-251+: 26-322: 33-452+: 46-853: 86-1253+: >125

Observer Code Station(s) monitored
A Clerkin A29 NAA
J Winkler A50 NAA NML
D Toldo A52 NAA NWC VTX
S Hansen A59 NAA
J Ellerbe A63 ICV
P King A80 FTA
W Moos A84 FTA
M Hill A87 NAA
J Mandaville A90 NPM
G DiFillipo A93 DHO HWU
T Poulos A95 NAA
R Battaiola A96 HWU
J Wallace A97 NAA
M King A99 HWU
P Campbell A100 NLK
G Bressan A101 HWU
F Steyn A102 NAA NWC
L Observatory A107 DHO
P Mortfield A108 NAA
The events listed above meet at least one of the following criteria
  1. Event reported by two or more observers within +/- 5 minutes
  2. Event matched to GOES-8 XRA event to within +/- 15 minutes and event time < 1000 UT
  3. Reported by observer with a high quality rating > 8 (scale 1-10)

SID ratings

SID ratings

Solar Events

November proved to be another active month, especially at the beginning. There was a total of 73 correlated SID events. Many of these had a lower importance rating but still represented a lot of activity for a sun near solar minimum. The GOES-12 spacecraft recorded a total of 225 X-Ray Events. Of these, two were X-Class and 15 were M-Class events, all in the first 10 days of the month. The 5th, 6th and 7th were the most active days.

If you look at the SID Section of the AAVSO website you will notice a new look. I have spent the last month working upgrading the form and content to be more organized and comprehensive. This is to benefit new observers interested in getting into SID monitoring but may also be of help to seasoned observers as I have added a few more sections I would like to add to this over time to include links to any of your personal SID related websites if you have them, and I also would be happy to add articles describing your equipment if it is specialized and you think it would be of interest to others. If you are interested in contributing, please contact me.

I had an interesting experience with noise pickup here at my home the past few months. All of a sudden I started getting very strong noise superimposed on my data charts. It was also very odd looking when looked at closely, exhibiting a very strange periodic behaviour. The noise would be there all day sometimes and some days never. It turned out it was usually on the weekends, and with a little deductive reasoning and some experimenting, I realized it was a new air ionizer that my wife had gotten and was running, usually on the weekends upstairs. Using a program called SpectraLab that runs with my computer sound card I could examine the spectrum and saw that the emissions from the ionizer were at a number of discrete frequencies below 24Khz and one just about at 24Khz, the source of my problem since I monitor NAA at that frequency. On the next page is a set of graphs showing the nasty noise these devices produce as well as a spectrum shot showing the noise spectra.

Noise produced from air ionizer while monitoring NAA at 24 Khz

Here is the spectrum measured using SpectraLab and my computer sound card.The time scale is across the bottom with a vertical frequency range from 0-24Khz. Note the periodic ionizer turn-on which comes in bursts of two and at each burst, one of which is captured by the plot on the right, there is a noise spike at 23.5, 12.1, 11.5, and 6.2 Khz. The two lines near the top are at 21.7 and 20.6 Khz. Clearly Air Ionizers should not be used near a VLF SID Monitoring antenna !!

 
  search engine |  site map |  links |  contact us