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A pdf format of the Solar Bulletin is available for printing.

Solar Bulletin

Paul Mortfield, EditorWeb: www.AAVSO.org
c/o AAVSO 49 Bay State Rd.Email: Paul@IndustrialStars.com
Cambridge, MA 02138ISSN 0271-8480

Volume 63 Number 6June 2007

The above plot is from my SID receiver on June 1. Several observers were able to capture these M-class events.

Gema Araujo's solar image on June 5, 2007 at 08:45UT of AR 10960. The M-class flares recorded above came from this group when it was still on the solar limb. It developed into a great active region as it came around the disk as seen in this photograph.

Remember to send me any solar drawings, SID flares or photos for me to include here. There's one person who's been sending in solar photos, but unfortunately there's no name or contact info, so please let me know who you are so I can give due credit in the images.

Sudden Ionospheric Disturbance Report

Michael Hill, SID Analyst
114 Prospect St
Marlborough, MA 01752 USA
noatak@aol.com

Sudden Ionospheric Disturbances (SID) Recorded During June 2007
(Analysis performed by Michael Hill, SID Analyst)

Date Max Imp
070601 0658 1
070601 1233 2
070601 1443 2+
070601 1457 2+
070601 2157 2
070602 0611 2
070602 1035 2
070603 0641 2
070603 0928 2
070604 0514 2+
070604 0946 1+
070605 1613 2+
070606 1726 2
070607 0646 2
070607 0802 1
070607 1048 2
070608 0844 2+
070608 1238 1-
070608 1432 2+
070609 0942 2
070609 1340 2+
070609 1347 2+
070610 1112 1+

Importance rating: Duration -1: <191: 19-251+: 26-322: 33-452+: 46-853: 86-1253+: >125

Observer Code Station(s) monitored
A Clerkin A29 NAA
D Toldo A52 FQE
M Hill A87 NAA
G Di Filippo A93 DHO
R Battaiola A96 HWU
J Wallace A97 NAA
P Campbell A100 NLK
F Steyn A102 NAA
L Observatory A107 DHO
P Mortfield A108 NAA
K Hubal A117 NAA NML
L Loudet A118 DHO
J Godet A119 GQD HWU ICV

The events listed above meet at least one of the following criteria

  1. Event reported by two or more observers within +/- 5 minutes
  2. Event matched to GOES-8 XRA event to within +/- 15 minutes and event time < 1000 UT
  3. Reported by observer with a high quality rating > 8 (scale 1-10)

Solar Events

June was really quite an active month for SID Monitoring. There were 23 Correlated SID events reported by observers and most of these were of medium importance rating. For the first time in many months I have a GOES-12 summary graph (below) that has a scale that goes beyond 20! Month to month I keep it at twenty as a minimum so that one can judge the activity level with just a glance. I increment in blocks of five as needed. June 4th was the most active of the days and was part of a week long surge of activity that lasted just beyond the first week of the month. By the numbers, there were 136 X-Ray flares recorded by the GOES 12 satellite. Of these, 17 were C Class and 9 were M Class. Although most of the month following the early burst of activity was very quiet, activity levels did begin to pick up again at the end.


Solar Flare Summary Based on GOES-12 Data

Solar Flare Summary

Sunspot Data

American Relative Sunspot Numbers(Ra) for June 2007
[boldface = maximum, minimum]
Day N Raw Mean Ra
1 32 30 20
2 28 41 28
3 28 47 35
4 35 44 33
5 34 53 38
6 29 51 36
7 35 58 40
8 34 42 29
9 29 19 14
10 34 16 11
11 33 14 10
12 32 13 9
13 34 10 8
14 25 1 1
15 39 0 0
16 29 0 0
17 35 0 0
18 30 0 0
19 34 0 0
20 33 0 0
21 35 0 0
22 32 1 0
23 33 0 0
24 35 0 0
25 33 10 7
26 39 12 8
27 34 13 9
28 31 18 12
29 32 27 18
30 32 27 19
Means 32.6 18.2 12.8

Total No. of Observers: 56
Total No. of Observations: 978
June 2007 Sunspot Observers

AAP A. Abbott 20
AJV J. Alonso 19
ARAG G. Araujo 29
BARH H. Barnes 10
BATR R. Battaiola 10
BERJ J. Berdejo 16
BMF M. Boschat 15
BRAB B. Branchett 29
BRAD D. Branchett 24
BRAM M. Bradbury 1
BRAR R. Branch 29
BROB R. Brown 30
BVC A. Buck 30
BYG Y. Brovarets 31
CAMP P. Campbell 1
CHAG G. Morales 30
CKB B. Cudnik 28
CLZ L. Corp 9
COMT T. Compton 19
DEJV J. van Delft 15
DGP G. Dyck 14
DUBF F. Dubois 25
FERJ J. Fernandez 22
FLET T. Fleming 18
FUJK K. Fujimori 21
GFT F. Gobet 11
GOEM M. Goetz 1
JENS S. Jenner 1
KAPJ J. Kaplan 26
KROL L. Krozel 1
KUZM M. Kuzmin 18
LARJ J. Larriba 16
LERM M. Lerman 10
MARE E. Mariani 19
MCE E. Mochizuki 21
MCHL L. McHenry 4
MEU E. Mason 2
MILJ J. Miller 1
MMI M. Moeller 24
OATS S. Oatney 23
OBSO IPS Observatory 16
PEKT R. Pektas 28
RICE E. C. Richardson 12
RITA A. Ritchie 11
SCGL G. Schott 23
SIMC C. Simpson 15
STEF G. Stefanopoulis 3
STQ N. Stoikidis 27
SUZM M. Suzuki 23
SZUM M. Szulc 23
TESD D. Teske 26
TJV J. Temprano 17
URBP P. Urbanski 27
VIDD D. Vidican 23
WILW W. Wilson 30
WRP R. Wheeler 1
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


10 cm Solar Flux and American Relative Sunspot Numbers (Ra) for June 2007
(10cm Source: http://www.drao.nrc.ca/icarus)
Figure 3


Smoothed Mean Sunspot Numbers (Rsm) from January 2000 to December 2006 (Waldmeier method).
 
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