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Solar Bulletin, January 2005
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 61 Number 1 | January 2005 |
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Table I. Mean Sunspot Numbers for January 2005
[boldface = maximum, minimum] | Table II. January Observers
|
| Day |
N |
Raw Mean |
Ra |
| 1 |
29 |
42 |
28 |
| 2 |
30 |
36 |
26 |
| 3 |
28 |
32 |
21 |
| 4 |
20 |
24 |
17 |
| 5 |
24 |
19 |
13 |
| 6 |
20 |
21 |
16 |
| 7 |
19 |
7 |
4 |
| 8 |
27 |
16 |
12 |
| 9 |
27 |
24 |
17 |
| 10 |
25 |
26 |
18 |
| 11 |
27 |
44 |
31 |
| 12 |
26 |
58 |
41 |
| 13 |
29 |
59 |
42 |
| 14 |
24 |
78 |
56 |
| 15 |
35 |
85 |
60 |
| 16 |
23 |
87 |
65 |
| 17 |
26 |
86 |
59 |
| 18 |
35 |
82 |
59 |
| 19 |
28 |
72 |
51 |
| 20 |
26 |
70 |
49 |
| 21 |
34 |
63 |
46 |
| 22 |
27 |
45 |
32 |
| 23 |
31 |
30 |
22 |
| 24 |
26 |
38 |
26 |
| 25 |
30 |
42 |
30 |
| 26 |
21 |
34 |
23 |
| 27 |
27 |
31 |
22 |
| 28 |
25 |
27 |
20 |
| 29 |
31 |
28 |
20 |
| 30 |
34 |
29 |
21 |
| 31 |
30 |
34 |
24 |
|
Means: | 26.7 | 44.1 | 31.5 |
No. of Observers: 61
No. of Observations: 844
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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
| |
SID Solar Flare Reports -- email: noatak@aol.com
- postal mail: Mike Hill
114 Prospect St. Marlboro, MA 01752
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|
| 10 |
AAP |
P.Abbott |
| 30 |
ARAG |
G.Araujo |
| 13 |
BARH |
H.Barnes |
| 7 |
BATR |
R.Battaiola |
| 1 |
BEB |
R.Berg |
| 7 |
BERJ |
J.Berdejo |
| 4 |
BLAJ |
J.Blackwell |
| 11 |
BMF |
M.Boschat |
| 18 |
BOSB |
B.Bose |
| 27 |
BRAB |
B.Branchett |
| 25 |
BRAD |
D.Branchett |
| 20 |
BRAR |
R.Branch |
| 10 |
BROB |
R.Brown |
| 4 |
CAMP |
P.Cambell |
| 29 |
CHAG |
G.Morales |
| 20 |
CKB |
B.Cudnik |
| 10 |
CLZ |
L.Corp |
| 29 |
CR |
T.Cragg |
| 17 |
DEJV |
J.van Delft |
| 7 |
DGP |
G.Dyck |
| 21 |
DRAJ |
J.Dragesco |
| 21 |
DUBF |
F.Dubois |
| 11 |
FEEC |
C.Feehrer |
| 15 |
FERJ |
J.Fernandez |
| 13 |
FLET |
T.Fleming |
| 27 |
FUJK |
K.Fujimori |
| 4 |
GOEM |
M.Goetz |
| 8 |
HAYK |
K.Hay |
| 9 |
HRUT |
T.Hrutkay |
| 14 |
JAMD |
D.James |
| 6 |
JEFT |
T.Jeffrey |
| 13 |
KAPJ |
J.Kaplan |
| 24 |
KNJS |
J&S Knight |
| 9 |
KROL |
L.Krozel |
| 6 |
LARJ |
J.Larriba |
| 21 |
LEVM |
M.Leventhal |
| 10 |
MARE |
E.Mariani |
| 17 |
MARJ |
J.Maranon |
| 24 |
MCE |
E.Mochizuki |
| 12 |
MEU |
E.Mason |
| 22 |
MMI |
M.Moeller |
| 13 |
OBSO |
IPS Observatory |
| 10 |
RICE |
E.Richardson |
| 14 |
RITA |
A.Ritchie |
| 12 |
SCGL |
G.Schott |
| 3 |
SCHG |
G.Scholl |
| 1 |
SDP |
D.Sharples |
| 8 |
SIMC |
C.Simpson |
| 2 |
STEF |
G.Stefanopoulos |
| 10 |
STEM |
G.Stemmler |
| 14 |
STQ |
N.Stoikidis |
| 26 |
SUZM |
M.Suzuki |
| 16 |
SZUM |
M.Szulc |
| 15 |
TESD |
D.Teske |
| 11 |
THR |
R.Thompson |
| 21 |
TJV |
J.Temprano |
| 13 |
URBP |
P.Urbanski |
| 16 |
VARG |
A.Vargas |
| 4 |
VIDD |
D.Vidican |
| 16 |
WILW |
W.Wilson |
| 13 |
YESH |
H.Yesilyaprak |
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| Table III. Means of Raw Group Counts (RG) and Ratios of Spots to Groups (S:G) in January 2005 |
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Click image to enlarge.
Fig. 1. 10 cm Solar Flux and American Relative Sunspot Numbers (Ra) for January 2005
(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 July 2004. |
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 2005
| (Analysis performed by Michael Hill, SID Analyst) |
| Date |
Max |
Imp |
Date |
Max |
Imp |
Date |
Max |
Imp |
| 050101 |
0014 |
1 |
050115 |
0341 |
1+ |
050117 |
2244 |
1- |
| 050101 |
0030 |
2+ |
050115 |
0418 |
1- |
050118 |
0043 |
1+ |
| 050101 |
1836 |
2+ |
050115 |
0433 |
1+ |
050118 |
0213 |
1- |
| 050102 |
1617 |
3+ |
050115 |
0612 |
3+ |
050118 |
0618 |
2 |
| 050103 |
0428 |
2+ |
050115 |
0638 |
1+ |
050118 |
0648 |
1 |
| 050103 |
0935 |
1- |
050115 |
0938 |
2 |
050118 |
1134 |
1+ |
| 050104 |
0617 |
2+ |
050115 |
1135 |
1- |
050118 |
1543 |
2+ |
| 050104 |
1111 |
1+ |
050115 |
1149 |
1 |
050118 |
1550 |
2 |
| 050105 |
1631 |
2+ |
050115 |
1233 |
1- |
050118 |
1850 |
1- |
| 050105 |
1642 |
2+ |
050115 |
1358 |
1- |
050118 |
1904 |
1 |
| 050109 |
0848 |
2 |
050115 |
1423 |
1+ |
050119 |
0527 |
2 |
| 050109 |
1443 |
1 |
050115 |
1657 |
1 |
050119 |
0732 |
2 |
| 050112 |
0708 |
1+ |
050115 |
1708 |
1 |
050119 |
0817 |
1+ |
| 050113 |
0809 |
2 |
050115 |
1819 |
1+ |
050119 |
1026 |
1- |
| 050113 |
1118 |
2 |
050115 |
1855 |
1+ |
050119 |
1336 |
1+ |
| 050113 |
1129 |
1- |
050115 |
1952 |
1- |
050119 |
1532 |
1- |
| 050113 |
1410 |
1- |
050115 |
2208 |
1+ |
050119 |
1542 |
2 |
| 050113 |
1635 |
1- |
050116 |
0211 |
2+ |
050120 |
0333 |
2 |
| 050113 |
1713 |
1+ |
050116 |
0757 |
1- |
050120 |
0647 |
2+ |
| 050113 |
1905 |
1- |
050116 |
1010 |
1- |
050120 |
0700 |
2 |
| 050114 |
0752 |
1- |
050116 |
1151 |
1- |
050120 |
1614 |
1+ |
| 050114 |
0838 |
1- |
050116 |
1517 |
1 |
050121 |
0026 |
1- |
| 050114 |
1020 |
1+ |
050116 |
1538 |
1- |
050121 |
0429 |
2+ |
| 050114 |
1145 |
1 |
050116 |
1721 |
1 |
050121 |
0636 |
1- |
| 050114 |
1241 |
1 |
050116 |
1806 |
1- |
050121 |
0647 |
1+ |
| 050114 |
1412 |
1+ |
050116 |
1832 |
1- |
050121 |
1016 |
1- |
| 050114 |
1911 |
1 |
050117 |
0000 |
1+ |
050121 |
1356 |
1- |
| 050114 |
2118 |
1+ |
050117 |
0246 |
1 |
050122 |
0259 |
1- |
| 050114 |
2204 |
1- |
050117 |
0952 |
1+ |
050122 |
0432 |
2 |
| 050115 |
0032 |
1- |
050117 |
1639 |
2 |
050123 |
0151 |
2+ |
| 050115 |
0042 |
2+ |
050117 |
1953 |
1+ |
050123 |
0503 |
2+ |
| 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 NAU |
| D Toldo |
A52 |
NAA NWC VTX |
| S Hansen |
A59 |
NAA |
| P King |
A80 |
FTA |
| W Moos |
A84 |
FTA |
| M Hill |
A87 |
NAA |
| J Mandaville |
A90 |
NPM |
| L Anderson |
A91 |
NWC |
| 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 |
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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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The sun started off 2005 with a bang! We had a lot of activity, much of it due to one very large sunspot group (region 720) which produced many energetic events. Observers reported 93 correlated SID events, a very large number for these times of solar minimum. There were not too many long duration events but this was made up for by the great quantity of events that were reported with a lower importance rating. In January the GOES-12 satellite recorded 240 X-Ray flares. Of these, 6 were X-Class flares! There have not often been this many in one month. A lot of these more energetic events, including an additional 21 M-Class flares, took place during the time frame from the 11th to the 21st of the month while sunspot region 720 crossed the disk. You can see that the SID events reported by our observers clustered around this time frame as well.
As we start another year, I want to take this opportunity to thank all of you for contributing your data so promptly and in good format. I've had to ask a few of you to occasionally fix things up with your data files but have always had a good response. This helps me out tremendously and I thank you for that as well. I hope the year ahead brings you good observing and interesting projects. I myself am working on a new H-Alpha telescope so hopefully I can "see" the flare events that we all record the effects of with our SID monitors. Happy New Year to all our observers.
– Michael Hill, AAVSO SID Analyst -
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