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Solar Bulletin, January 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 1 | January 2004 |
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Table I. Mean Sunspot Numbers for January 2004
[boldface = maximum, minimum] | Table II. January Observers
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| Day |
N |
Raw Mean |
Ra |
| 1 |
23 |
49 |
36 |
| 2 |
24 |
64 |
46 |
| 3 |
28 |
75 |
51 |
| 4 |
22 |
69 |
48 |
| 5 |
20 |
66 |
46 |
| 6 |
25 |
61 |
43 |
| 7 |
25 |
73 |
55 |
| 8 |
26 |
61 |
46 |
| 9 |
23 |
69 |
48 |
| 10 |
28 |
61 |
41 |
| 11 |
26 |
51 |
34 |
| 12 |
18 |
48 |
32 |
| 13 |
24 |
58 |
39 |
| 14 |
18 |
51 |
36 |
| 15 |
28 |
61 |
45 |
| 16 |
20 |
75 |
52 |
| 17 |
19 |
63 |
47 |
| 18 |
28 |
65 |
48 |
| 19 |
36 |
85 |
62 |
| 20 |
28 |
87 |
60 |
| 21 |
26 |
88 |
62 |
| 22 |
28 |
78 |
54 |
| 23 |
27 |
65 |
46 |
| 24 |
25 |
49 |
40 |
| 25 |
27 |
23 |
17 |
| 26 |
21 |
8 |
6 |
| 27 |
24 |
1 |
0 |
| 28 |
32 |
6 |
4 |
| 29 |
32 |
23 |
16 |
| 30 |
29 |
35 |
25 |
| 31 |
25 |
57 |
41 |
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Means: | 25.3 | 55.6 | 39.4 |
No. of Observers: 59
No. of Observations: 785
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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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|
8
17
11
2
1
7
17
25
27
26
23
2
3
4
26
16
11
12
19
16
13
8
18
27
4
4
27
6
6
20
6
14
4
20
1
9
21
9
24
29
11
9
17
11
17
3
11
17
28
12
10
22
14
9
10
14
6
13
8
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AAP
ARAG
BARH
BATR
BEB
BERJ
BMF
BOSB
BRAB
BRAR
BROB
BURS
CAMP
CARJ
CHAG
CKB
CLZ
DGP
DRAJ
DUBF
FEEC
FERJ
FLET
FUJK
GOEM
GOLA
GUNM
HAYK
HRUT
JAMD
JEFT
KAPJ
KHAR
KNJS
KROL
LARJ
LEVM
MARE
MARJ
MCE
MMI
OBSO
RITA
SCGL
SCHG
STEF
STEM
STQ
SUZM
SZAK
SZUM
TESD
THR
TJV
URBP
VARG
VELM
WILW
YESH
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P.Abbott
G.Araujo
H.Barnes
R.Battaiola
R.Berg
J.Berdejo
M.Boschat
B.Bose
B.Branchett
R.Branch
R.Brown
S.Burgess
P.Campbell
J.Carlson
G.Morales
B.Cudnik
C.Laurent
G.Dyck
J.Dragesco
F.Dubois
C.Feehrer
J.Fernandes
T.Fleming
K.Fujimori
M.Goetz
A.Golovin
M.Gundlach
K.Hay
T.Hrutkay
D.James
T.Jeffrey
J.Kaplan
R.Khan
J&S Knight
L.Krozel
J.Larriba
M.Leventhal
E.Mariani
J.Maranon
E.Mochizuki
M.Moeller
IPS Observatory
A.Ritchie
G.Schott
G.Scholl
G.Stefanopoulis
G.Stemmler
N.Stoikidis
M.Suzuki
K.Szatkowski
M.Szulc
D.Teske
R.Thompson
J.Temprano
P.Urbanski
A.Vargas
M.Velea
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 January 2004 |
| Day |
RG |
S:G |
Day |
RG |
S:G |
Day |
RG |
S:G |
Day |
RG |
S:G |
| 1 |
2.9 |
6.9 |
9 |
2.3 |
20.2 |
17 |
3.7 |
6.8 |
25 |
2.0 |
1.9 |
| 2 |
3.1 |
10.9 |
10 |
2.2 |
17.5 |
18 |
3.7 |
7.6 |
26 |
0.7 |
2.0 |
| 3 |
3.3 |
13.2 |
11 |
2.1 |
14.3 |
19 |
4.3 |
9.9 |
27 |
0.1 |
3.0 |
| 4 |
3.2 |
11.8 |
12 |
2.6 |
8.2 |
20 |
4.1 |
10.9 |
28 |
0.5 |
1.7 |
| 5 |
2.7 |
14.9 |
13 |
3.5 |
6.7 |
21 |
4.0 |
11.7 |
29 |
1.8 |
2.8 |
| 6 |
2.5 |
14.8 |
14 |
3.1 |
6.6 |
22 |
4.2 |
8.6 |
30 |
2.6 |
3.8 |
| 7 |
3.2 |
13.1 |
15 |
3.5 |
7.2 |
23 |
4.4 |
4.8 |
31 |
3.8 |
5.0 |
| 8 |
2.4 |
15.1 |
16 |
4.3 |
7.6 |
24 |
3.9 |
2.5 |
Mn. |
2.9 |
8.8 |
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Click image to enlarge.
Fig. 1. 10 cm Solar Flux and American Relative Sunspot Numbers (Ra) for January 2004
(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 January 2004
| (Analysis performed by Michael Hill, SID Analyst) |
| Date |
Max |
Imp |
Date |
Max |
Imp |
| 040101 |
0323 |
1 |
040117 |
1754 |
2 |
| 040101 |
0543 |
1+ |
040118 |
0017 |
1 |
| 040101 |
0655 |
1- |
040119 |
0532 |
2 |
| 040102 |
0947 |
1 |
040119 |
1237 |
1- |
| 040104 |
0953 |
2+ |
040119 |
2004 |
2 |
| 040104 |
1819 |
1- |
040120 |
0742 |
2 |
| 040105 |
0013 |
1 |
040126 |
0611 |
1- |
| 040106 |
0627 |
2+ |
040131 |
0621 |
2 |
| 040106 |
0720 |
1+ |
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| 040107 |
0403 |
2+ |
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| 040107 |
0848 |
1+ |
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| 040107 |
1026 |
1+ |
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| 040108 |
0506 |
2+ |
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| 040109 |
0124 |
1- |
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| 040109 |
0142 |
2+ |
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| 040110 |
0334 |
2 |
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| 040110 |
0426 |
2 |
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| 040110 |
0515 |
2 |
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| 040111 |
0722 |
2 |
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| 040112 |
0840 |
1 |
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| 040115 |
0631 |
2 |
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| 040117 |
0400 |
2 |
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| 040117 |
0803 |
1+ |
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| 040117 |
0918 |
1- |
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| 040117 |
0946 |
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 |
NAU |
| J Winkler |
A50 |
NAA NXX |
| D Toldo |
A52 |
NAA NPM NWC |
| W Moos |
A84 |
ICV |
| M Hill |
A87 |
NAA |
| G DiFillipo |
A93 |
DHO HWU |
| T Poulos |
A95 |
NAA |
| J Wallace |
A97 |
NAA |
| P Campbell |
A100 |
NLK |
| F Steyn |
A102 |
NWC |
| B Bose |
A103 |
VTX3 |
| P Mortfield |
A108 |
NLK |
| T State |
A110 |
NML |
| A Son |
A112 |
DHO |
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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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January has ushered in a new year with a slow month. There were only 33 correlated SID events reported by observers. More than one observer reported "NO SID Events." Even the NOAA-SEC event reports had a first for me with a report on the 28th that simply stated "NO EVENT Reports." There were two periods of increased activity , one around the 9th of the month and another around the 18th. After the 20th the activity reduced to almost zero for a number of days. The GOES-12 Satellite reported 191 X-Ray flare events. Of these, most were B and C Class events. There were 11 M-Class events registered between the period of the 5-9th and the 17-20th. No X-Class events were recorded.
I have finally gotten around to building the Hexagonal Loop antenna and Simple SID Receiver designed by Cap Hossfield back in October 2002.This was one of his last projects before he died. I am happy to report that the loop works great, not to mention its' commanding presence in my living room. I measured it as having a bandwidth of about 500hz compared to 1500hz for the smaller loop. Below is a Capacitance Tuning chart that I derived experimentally. I did make a couple of changes to the receiver design. For the output resistor, instead of 5K, I used a 100K resitor with a 22 uF cap across it to eliminate noise. I also replaced R4 with a variable resistor, 0 - 50K, to allow setting the total gain anywhere from 60 up to 900. (A great design by Cap - Thanks go to him.)
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