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Solar Bulletin, June 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 |
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| Volume 60 Number 6 | June 2004 |
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Table I. Mean Sunspot Numbers for June 2004
[boldface = maximum, minimum] | Table II. June Observers
|
| Day |
N |
Raw Mean |
Ra |
| 1 |
34 |
54 |
37 |
| 2 |
37 |
49 |
34 |
| 3 |
39 |
50 |
36 |
| 4 |
39 |
46 |
32 |
| 5 |
37 |
41 |
30 |
| 6 |
32 |
30 |
23 |
| 7 |
39 |
44 |
31 |
| 8 |
47 |
36 |
27 |
| 9 |
40 |
39 |
31 |
| 10 |
28 |
35 |
26 |
| 11 |
31 |
31 |
23 |
| 12 |
39 |
26 |
20 |
| 13 |
38 |
39 |
29 |
| 14 |
35 |
46 |
35 |
| 15 |
39 |
67 |
50 |
| 16 |
48 |
84 |
66 |
| 17 |
34 |
87 |
63 |
| 18 |
31 |
99 |
70 |
| 19 |
34 |
100 |
73 |
| 20 |
46 |
121 |
91 |
| 21 |
41 |
116 |
89 |
| 22 |
34 |
100 |
72 |
| 23 |
35 |
78 |
57 |
| 24 |
40 |
62 |
46 |
| 25 |
35 |
44 |
34 |
| 26 |
28 |
36 |
27 |
| 27 |
40 |
35 |
25 |
| 28 |
36 |
38 |
29 |
| 29 |
39 |
37 |
27 |
| 30 |
42 |
30 |
22 |
| 31 |
--- |
--- |
--- |
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Means: | 37.2 | 56.7 | 41.9 |
No. of Observers: 67
No. of Observations: 1117
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Reporting Addresses |
Sunspot Reports -- email: solar@aavso.org
- postal mail: AAVSO, 25 Birch St. Cambridge, MA 02138
- FAX (AAVSO): (617) 354-0665
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SID Solar Flare Reports -- email: noatak@aol.com
- postal mail: Mike Hill
114 Prospect St. Marlboro, MA 01752
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|
| 9 |
AAP |
P.Abbott |
| 30 |
ARAG |
G.Araujo |
| 8 |
BARH |
H.Barnes |
| 10 |
BATR |
R.Battaiola |
| 17 |
BEB |
R.Berg |
| 14 |
BERJ |
J.Berdejo |
| 5 |
BLAJ |
J.Blackwell |
| 22 |
BMF |
M.Boschat |
| 16 |
BOSB |
B.Bose |
| 26 |
BRAB |
B.Branchett |
| 29 |
BRAR |
R.Branch |
| 30 |
BROB |
R.Brown |
| 4 |
BXA |
A.Baransky |
| 12 |
CAMP |
P.Cambell |
| 18 |
CARJ |
J.Carlson |
| 30 |
CHAG |
G.Morales |
| 22 |
CKB |
B.Cudnik |
| 20 |
CLZ |
C.Laurent |
| 22 |
COMT |
T.Compton |
| 25 |
CR |
T.Cragg |
| 23 |
DEJV |
J.van Delft |
| 11 |
DELS |
S.Delaney |
| 14 |
DGP |
G.Dyck |
| 12 |
DPP |
P.dePonthiere |
| 29 |
DRAJ |
J.Dragesco |
| 24 |
DUBF |
F.Dubois |
| 21 |
FEEC |
C.Feehrer |
| 17 |
FERJ |
J.Fernandes |
| 21 |
FLET |
T.Fleming |
| 19 |
FUJK |
K.Fujimori |
| 10 |
GOEM |
M.Goetz |
| 7 |
HALB |
B.Halls |
| 13 |
HAYK |
K.Hay |
| 14 |
HRUT |
T.Hrutkay |
| 15 |
JAMD |
D.James |
| 3 |
JENS |
S.Jenner |
| 16 |
KAPJ |
J.Kaplan |
| 30 |
KNJS |
J&S Knight |
| 5 |
KQR |
R.Kinne |
| 5 |
KROL |
L.Krozel |
| 3 |
KUZM |
M.Kuzmin |
| 13 |
LARJ |
J.Larriba |
| 15 |
LERM |
M.Lerman |
| 17 |
MARE |
E.Mariani |
| 30 |
MARJ |
J.Maranon |
| 12 |
MAV |
D.Matsnev |
| 18 |
MCE |
E.Mochizuki |
| 25 |
MMI |
M.Moeller |
| 18 |
OBSO |
IPS Observatory |
| 4 |
PARN |
N.Parker |
| 13 |
RICE |
E.Richardson |
| 22 |
RITA |
A.Ritchie |
| 20 |
SCGL |
G.Schott |
| 2 |
SDP |
D.Sharples |
| 16 |
SIMC |
C.Simpson |
| 6 |
STEF |
G.Stefanopoulis |
| 22 |
STEM |
G.Stemmler |
| 25 |
STQ |
N.Stoikidis |
| 20 |
SUZM |
M.Suzuki |
| 30 |
TESD |
D.Teske |
| 14 |
THR |
R.Thompson |
| 18 |
TJV |
J.Temprano |
| 23 |
URBP |
P.Urbanski |
| 4 |
VARG |
A.Vargas |
| 10 |
VIDD |
D.Vidican |
| 17 |
WILW |
W.Wilson |
| 22 |
YESH |
H.Yesilyaprak |
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| Table III. Means of Raw Group Counts (RG) and Ratios of Spots to Groups (S:G) in June 2004 |
| Day |
RG |
S:G |
Day |
RG |
S:G |
Day |
RG |
S:G |
Day |
RG |
S:G |
| 1 |
3.3 |
6.9 |
9 |
3.0 |
3.6 |
17 |
4.6 |
8.7 |
25 |
2.9 |
5.2 |
| 2 |
2.8 |
7.6 |
10 |
2.8 |
2.5 |
18 |
4.1 |
14.5 |
26 |
2.3 |
5.8 |
| 3 |
3.0 |
6.9 |
11 |
2.5 |
2.7 |
19 |
4.0 |
14.9 |
27 |
2.6 |
3.3 |
| 4 |
2.7 |
6.6 |
12 |
2.1 |
2.8 |
20 |
5.2 |
13.3 |
28 |
2.7 |
4.1 |
| 5 |
2.8 |
4.5 |
13 |
3.0 |
3.0 |
21 |
5.0 |
13.0 |
29 |
2.6 |
4.3 |
| 6 |
2.2 |
4.0 |
14 |
3.4 |
3.6 |
22 |
4.7 |
11.4 |
30 |
2.1 |
4.1 |
| 7 |
3.3 |
3.5 |
15 |
3.9 |
6.9 |
23 |
3.8 |
10.7 |
31 |
--- |
--- |
| 8 |
2.6 |
3.8 |
16 |
4.9 |
7.1 |
24 |
3.2 |
9.4 |
Mn. |
3.3 |
6.6 |
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Click image to enlarge.
Fig. 1. 10 cm Solar Flux and American Relative Sunspot Numbers (Ra) for June 2004
(10cm Source: http://www.drao.nrc.ca/icarus) |
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Click image to enlarge.
Fig.2 Smoothed Mean Sunspot Numbers (Waldmeier method) from January 2000 to December 2003. |
Michael Hill, SID Analyst
114 Prospect St
Marlborough, MA 01752 USA
noatak@aol.com |
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Sudden Ionospheric Disturbances (SID) Recorded During June 2004
| (Analysis performed by Michael Hill, SID Analyst) |
| Date |
Max |
Imp |
Date |
Max |
Imp |
Date |
Max |
Imp |
| 040612 |
1842 |
1+ |
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| 040612 |
1944 |
1+ |
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| 040613 |
1152 |
2+ |
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| 040619 |
0815 |
1- |
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| 040619 |
0830 |
1- |
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| 040619 |
1938 |
2 |
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| 040620 |
1329 |
1+ |
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| 040621 |
1706 |
2+ |
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| 040621 |
1717 |
1+ |
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| 040622 |
2212 |
2 |
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| 040626 |
0719 |
2 |
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| 040627 |
1558 |
2 |
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| 040627 |
1930 |
1+ |
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| 040627 |
2011 |
2+ |
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| 040627 |
2023 |
1+ |
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| Importance rating: Duration | -1: <19 | 1: 19-25 | 1+: 26-32 | 2: 33-45 | 2+: 46-85 | 3: 86-125 | 3+: >125 |
| Observer |
Code |
Station(s) monitored |
| A Clerkin |
A29 |
NAA |
| J Winkler |
A50 |
NAA NML |
| D Toldo |
A52 |
NAA, NSS |
| J Ellerbe |
A63 |
ICV |
| P King |
A80 |
HWU |
| W Moos |
A84 |
FTA |
| M Hill |
A87 |
NAA |
| J Mandaville |
A90 |
NPM |
| G DiFillipo |
A93 |
DHO HWU |
| T Poulos |
A95 |
NAA |
| J Wallace |
A97 |
NAA |
| M King |
A99 |
HWU |
| P Campbell |
A100 |
NLK |
| B Bose |
A103 |
VTX1 |
| L Observatory |
A107 |
DHO |
| P Mortfield |
A108 |
NLK |
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| The events listed above meet at least one of the following criteria |
- Event reported by two or more observers within +/- 5 minutes
- Event matched to GOES-8 XRA event to within +/- 15 minutes and event time < 1000 UT
- Reported by observer with a high quality rating > 8 (scale 1-10)
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June was a VERY slow month for SID activity. A number of observers reported either no events or only one or two. As can be seen in the chart below, the beginning of the month was especially slow but picked up somewhat towards the end as a number of active regions emerged on the surface of the sun. There were only 167 X-Ray flare events recorded by the GOES-12 Satellite. Of these, only one was an M-Class event. All others were B or C class events. As would be expected with such low activity, observers reported only 16 correlated SID events. A slow month indeed. I have noticed, with this total lack of activity, that my received signal is unusually smooth each day. Previously, in addition to the characteristic SIDs, my traces have shown appeciable waviness to them. I always attributed this to reception effects or interference. I think this might not be the case. Yesterday the RSGA solar activity report on the web indicated that a new active region was rotating onto the disk and was elevating the "background" X-Ray flux from B1 to B4. This got me to thinking about the wavy signal I've seen during periods of elevated "SID" activity and the idea that what I'm seeing is the overall variations in background X-Ray flux, without an actual flare event. And I'm surprised by the amount of variation. It would be interesting to see if any correlation could be made between the background variation and specific SID events to see if there is some sort of indication that an event is about to happen. Is there a churning of the soup, so to speak, before an active region pops? Could this be a predictive tool? Interesting stuff and possibly a way to make watching SID more interesting beyond just counting events. Watch your charts, especially as active regions emerge and see if there is a change from a nice smooth daily signal to one that gets choppy or wavy. In addition see if there is any correlation between this and the SID events you record. Thanks to all of our observers for submitting reports, even if you see no SIDs.
Solar Flare Summary Based on GOES-12 Data – June 2004
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