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| Paul Mortfield, Editor | Web: www.AAVSO.org |
| c/o AAVSO 49 Bay State Rd. | Email: Paul@IndustrialStars.com |
| Cambridge, MA 02138 | ISSN 0271-8480 |
| Volume 64 Number 6 | Jun 2008 |
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| Tilting Sun by Les Cowley |
Les Cowley created this useful program called Tilting Sun. Enter you location and time and it creates an image of the sun taking into account P, Lo, Bo for either Alt-Az or Equatorial mounted scopes. I found it so convenient that his default location is set to Toronto. Thanks Les. You can grab the program at www.atoptics.co.uk
Don't forget to submit your images, drawings and SID plots to include in the bulletin.
Sudden Ionospheric Disturbance Report
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 2008
(Analysis performed by Michael Hill, SID Analyst)
| Date |
Max |
Imp |
| No SIDS detected |
| Importance rating: Duration | -1: <19 | 1: 19-25 | 1+: 26-32 | 2: 33-45 | 2+: 46-85 | 3: 86-125 | 3+: >125 |
| Observer |
Code |
| A Clerkin |
A29 |
| D Toldo |
A52 |
| P King |
A80 |
| M Hill |
A87 |
| R battaiola |
A96 |
| J Wallace |
A97 |
| M King |
A99 |
| F Steyn |
A102 |
| P Mortfield |
A108 |
| K Hubal |
A117 |
| L Loudet |
A118 |
| J.P. Godet |
A119 |
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)
I think the chart below, or lack thereof, speaks for itself. June was a month with not even one X-Ray flare detected by the GOES satellite. There were no correlated SID events detected for the month as would be expected. There is certainly talk now that something odd is up with the sun given the long duration of the absolute minimum conditions we have been experiencing. I have read one article by a solar scientist, however, that purports that given the range of minimums experienced over the years this is a longer than usual minimum but not out of the range or normal - at least not yet. Our observations certainly tell the story and will continue to do so. The longer it goes the closer we will be to an abnormal solar minimum. But for now we should not get too concerned and hopefully in the coming months, there will be some activity worth monitoring.
Solar Flare Summary Based on GOES-12 Data
There were no X-Ray Flares Detected in June
Sunspot Data
American Relative Sunspot Numbers(Ra) for June 2008 [boldface = maximum, minimum]
| Day |
N |
Raw
Mean |
Ra |
| 1 |
26 |
0 |
0 |
| 2 |
34 |
0 |
0 |
| 3 |
31 |
0 |
0 |
| 4 |
30 |
0 |
0 |
| 5 |
26 |
2 |
2 |
| 6 |
32 |
1 |
0 |
| 7 |
28 |
0 |
0 |
| 8 |
33 |
0 |
0 |
| 9 |
29 |
3 |
2 |
| 10 |
28 |
12 |
9 |
| 11 |
24 |
11 |
8 |
| 12 |
32 |
11 |
8 |
| 13 |
31 |
4 |
3 |
| 14 |
31 |
0 |
0 |
| 15 |
29 |
3 |
2 |
| 16 |
32 |
10 |
7 |
| 17 |
33 |
11 |
8 |
| 18 |
34 |
11 |
8 |
| 19 |
31 |
11 |
8 |
| 20 |
34 |
12 |
9 |
| 21 |
36 |
11 |
8 |
| 22 |
35 |
9 |
7 |
| 23 |
36 |
1 |
1 |
| 24 |
32 |
0 |
0 |
| 25 |
33 |
0 |
0 |
| 26 |
32 |
0 |
0 |
| 27 |
30 |
0 |
0 |
| 28 |
29 |
0 |
0 |
| 29 |
34 |
0 |
0 |
| 30 |
30 |
0 |
0 |
Means |
31.2 |
4.1 |
3.0 |
Total No. of Observers: 49
Total No. of Observations: 949
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June 2008 Sunspot Observers
| AAP |
A. Abbott |
17 |
| AJV |
J. Alonso |
25 |
| ARAG |
G. Araujo |
30 |
| BARH |
H. Barnes |
9 |
| BERJ |
J. Berdejo |
12 |
| BMF |
M. Boschat |
12 |
| BRAB |
B. Branchett |
30 |
| BRAD |
D. Branchett |
13 |
| BRAR |
R. Branch |
27 |
| BROB |
R. Brown |
30 |
| BVC |
A. Buck |
30 |
| CHAG |
G. Morales |
29 |
| CKB |
B. Cudnik |
27 |
| CLZ |
L. Corp |
15 |
| CNT |
D. Chantiles |
14 |
| COMT |
T. Compton |
12 |
| DGP |
G. Dyck |
14 |
| DUBF |
F. Dubois |
27 |
| FERJ |
J. Fernandez |
15 |
| FLET |
T. Fleming |
18 |
| FUJK |
K. Fujimori |
21 |
| GFT |
F. Gobet |
4 |
| HAYK |
K. Hay |
9 |
| HMQ |
M. Harris |
18 |
| KAPJ |
J. Kaplan |
17 |
| KNJS |
J. & S. Knight |
12 |
| LARJ |
J. Larriba |
18 |
| MARJ |
J. Maranon |
28 |
| MCE |
E. Mochizuki |
20 |
| MEU |
E. Mason |
7 |
| MILJ |
J. Miller |
21 |
| OATS |
S. Oatney |
25 |
| OBSO |
IPS Observatory |
16 |
| RICE |
E. C. Richardson |
19 |
| SCGL |
G. Schott |
26 |
| SIMC |
C. Simpson |
10 |
| STEF |
G. Stefanopoulis |
12 |
| STQ |
N. Stoikidis |
29 |
| SUZM |
M. Suzuki |
21 |
| SZUM |
M. Szulc |
23 |
| TESD |
D. Teske |
27 |
| TJV |
J. Temprano |
14 |
| URBP |
P. Urbanski |
30 |
| VARG |
A. Vargas |
27 |
| VIDD |
D. Vidican |
14 |
| WILW |
W. Wilson |
30 |
| WRP |
R. Wheeler |
5 |
| YESH |
H. Yesilyaprak |
26 |
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Reporting addresses:
Sunspot Reports
Email: solar@aavso.org
Postal Mail: AAVSO,
49 Bay State Rd. Cambridge, MA, 02138
Fax: 617-354-0665
SID Flare Reports
Email: noatak@aol.com
Postal Mail: Mike Hill,
114 Prospect St., Marlboro, MA, 01752
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Smoothed Mean Sunspot Numbers (Rsm) from January 2000 to December 2007 (Waldmeier method). |
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10 cm Solar Flux and American Relative Sunspot Numbers (Ra) for June 2008
(10cm Source: http://www.drao.nrc.ca/icarus) |
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