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Solar Bulletin, September 2003
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 59 Number 9 | September 2003 |
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Table I. Mean Sunspot Numbers for September 2003
[boldface = maximum, minimum] | Table II. September Observers |
| Day |
N |
Raw Mean |
Ra |
Std. Error |
| 1 |
37 |
76 |
53 |
2.1 |
| 2 |
38 |
64 |
46 |
1.5 |
| 3 |
41 |
60 |
45 |
2.0 |
| 4 |
39 |
72 |
50 |
1.4 |
| 5 |
43 |
58 |
43 |
1.1 |
| 6 |
44 |
55 |
40 |
1.7 |
| 7 |
45 |
37 |
26 |
1.4 |
| 8 |
38 |
26 |
18 |
1.3 |
| 9 |
39 |
29 |
21 |
0.9 |
| 10 |
43 |
44 |
31 |
1.5 |
| 11 |
40 |
49 |
35 |
0.8 |
| 12 |
38 |
44 |
33 |
1.0 |
| 13 |
41 |
45 |
32 |
0.9 |
| 14 |
36 |
51 |
37 |
1.6 |
| 15 |
41 |
53 |
38 |
1.9 |
| 16 |
43 |
63 |
46 |
1.8 |
| 17 |
50 |
83 |
62 |
1.3 |
| 18 |
37 |
80 |
60 |
1.5 |
| 19 |
38 |
73 |
53 |
1.5 |
| 20 |
45 |
65 |
49 |
1.2 |
| 21 |
48 |
69 |
52 |
1.4 |
| 22 |
41 |
80 |
57 |
1.6 |
| 23 |
35 |
92 |
66 |
1.8 |
| 24 |
45 |
100 |
75 |
2.0 |
| 25 |
39 |
105 |
77 |
2.3 |
| 26 |
34 |
120 |
85 |
2.8 |
| 27 |
34 |
122 |
86 |
2.6 |
| 28 |
37 |
109 |
79 |
2.1 |
| 29 |
34 |
99 |
73 |
2.4 |
| 30 |
28 |
102 |
75 |
2.4 |
| 31 |
--- |
--- |
--- |
--- |
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Means: | 39.7 | 70.8 | 51.5 | |
No. of Observers: 68
No. of Observations: 1191
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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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|
15
28
16
8
14
12
13
27
29
26
7
19
29
24
18
18
29
30
4
22
10
23
24
14
19
23
22
19
12
7
15
17
9
6
22
10
24
1
7
13
24
2
14
27
18
27
18
14
21
26
1
13
12
25
27
23
15
17
25
28
20
23
22
17
8
6
23
11
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AAP
ARAG
ATON
BARH
BATR
BERJ
BOSB
BRAB
BRAR
BROB
CAMP
CARJ
CHAG
CKB
CLZ
COMT
CORA
CR
CVJ
DEJV
DEMF
DRAJ
ELR
FEEC
FERJ
FLET
FUJK
GIOR
GOEM
HAYK
HRUT
JAMD
JEFT
JENS
KAPJ
KHAR
KNJS
KROL
LARJ
LERM
LEVM
LUBT
MALK
MARJ
MCE
MMI
OBSO
RICE
RITA
SCGL
SDP
SIMC
STEF
STEM
STQ
SUZM
SYP
SZAK
SZUM
TESD
THR
TJV
URBP
VARG
VELM
VIDD
WILW
YESH
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P.Abbott
G.Araujo
A.Attanasio
H.Barnes
R.Battaiola
J.Berdejo
B.Bose
B.Branchett
R.Branch
R.Brown
P.Campbell
J.Carlson
G.Morales
B.Cudnik
C.Laurent
T.Compton
A.Coroas
T.Cragg
J.Carvajal
J.van Delft
F.Dempsey
J.Dragesco
E.Reed
C.Feehrer
J.Fernandes
T.Fleming
K.Fujimori
R.Giovanoni
M.Goetz
K.Hay
T.Hrutkay
D.James
T.Jeffrey
S.Jenner
J.Kaplan
R.Khan
J&S Knight
L.Krozel
J.Larriba
M.Lerman
M.Leventhal
T.Lubbers
K.Malde
J.Maranon
E.Mochizuki
M.Moeller
IPS Observatory
E.Richardson
A.Ritchie
G.Schott
D.Sharples
C.Simpson
G.Stefanopoulis
G.Stemmler
N.Stoikidis
M.Suzuki
Paul Soron
K.Szatkowski
M.Szulc
D.Teske
R.Thompson
J.Temprano
P.Urbanski
A.Vargas
M.Velea
D.Vidican
W.Wilson
H.Yesilyaprak
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| Table III. Means of Raw Group Counts (RG) and Ratios of Spots to Groups (S:G) in September 2003 |
| Day |
RG |
S:G |
Day |
RG |
S:G |
Day |
RG |
S:G |
Day |
RG |
S:G |
| 1 |
5.1 |
4.9 |
9 |
1.6 |
8.1 |
17 |
5.3 |
5.7 |
25 |
4.6 |
12.8 |
| 2 |
4.5 |
4.2 |
10 |
1.9 |
13.2 |
18 |
5.0 |
6.0 |
26 |
5.3 |
12.6 |
| 3 |
4.2 |
4.3 |
11 |
2.3 |
11.3 |
19 |
5.1 |
4.3 |
27 |
5.2 |
13.5 |
| 4 |
4.6 |
5.7 |
12 |
2.3 |
9.1 |
20 |
4.6 |
4.1 |
28 |
4.8 |
12.7 |
| 5 |
3.7 |
5.7 |
13 |
2.2 |
10.5 |
21 |
4.4 |
5.7 |
29 |
5.6 |
7.7 |
| 6 |
4.0 |
3.8 |
14 |
3.1 |
6.5 |
22 |
4.8 |
6.7 |
30 |
6.0 |
7.0 |
| 7 |
3.0 |
2.3 |
15 |
4.0 |
3.3 |
23 |
5.2 |
7.7 |
31 |
--- |
--- |
| 8 |
1.7 |
5.3 |
16 |
4.1 |
5.4 |
24 |
4.7 |
11.3 |
Mn. |
4.1 |
7.4 |
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Click image to enlarge.
Fig. 1. 10 cm Solar Flux and American Relative Sunspot Numbers (Ra) for September 2003
(10cm Source: http://www.drao.nrc.ca/icarus) |
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Click image to enlarge.
Fig.2 Maximum, Mean, and Minimum Ra Values for Each Month from January 2001 to Present. |
Michael Hill, SID Analyst
114 Prospect St
Marlborough, MA 01752 USA
noatak@aol.com |
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Sudden Ionospheric Disturbances (SID) Recorded During September 2003
| (Analysis performed by Michael Hill, SID Analyst) |
| Date |
Max |
Imp |
Date |
Max |
Imp |
Date |
Max |
Imp |
| 030907 |
1406 |
2+ |
030930 |
2019 |
2+ |
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| 030912 |
0902 |
1+ |
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| 030912 |
0921 |
2 |
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| 030913 |
0707 |
1 |
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| 030913 |
0743 |
2 |
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| 030914 |
0127 |
1- |
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| 030915 |
0452 |
2+ |
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| 030915 |
0645 |
1+ |
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| 030915 |
0712 |
2 |
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| 030916 |
0525 |
1+ |
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| 030916 |
0902 |
1+ |
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| 030920 |
0514 |
1+ |
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| 030920 |
0645 |
2 |
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| 030924 |
0438 |
1+ |
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| 030924 |
0625 |
1- |
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| 030924 |
0718 |
2 |
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| 030924 |
0856 |
1- |
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| 030929 |
0401 |
2+ |
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| 030929 |
0510 |
2+ |
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| 030929 |
1510 |
2 |
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| 030929 |
2148 |
2+ |
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| 030930 |
0339 |
2+ |
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| 030930 |
0515 |
2 |
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| 030930 |
0802 |
2 |
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| 030930 |
0854 |
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 |
| J Winkler |
A50 |
NPM XXX |
| D Toldo |
A52 |
NWC XXX |
| L Anderson |
A91 |
NWC |
| G DiFillipo |
A93 |
DHO HWU |
| M King |
A99 |
HWU |
| F Steyn |
A102 |
NWC |
| B Bose |
A103 |
VTX |
| Truman State |
A110 |
XXX |
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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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September was another slow month. There were only 26 correlated SID Events to report by observers. The highest importance rating was only a 2+. This corresponds well with the results from the the GOES-12 spacecraft. There were only 152 X-Ray flares recorded for the month. All but one, which was an M-Class event, were lower B and C Class events. The peak activity occurred around the 15th of the month and then again at the end of the month. There were actually two days with no flares at all, the 2nd and the 8th. We have a new station recording SID data which was built by a student at Truman State Univerity located in Kirksville, Missouri. They have an new radio astronomy interest as part of the astronomy department that includes the Radio Jove Jupiter monitoring project, as well as the SID Monitoring station. They have been assigned the station ID of A110 and reported for the first time this month.
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