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Solar Bulletin, June 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
Volume 59 Number 6June 2003
Table I. Mean Sunspot Numbers for June 2003
[boldface = maximum, minimum]		Table II. June Observers
Day N Raw s.d. Ra s.d. s.e.
1 47 53 3.0 40 1.9 0.28
2 45 55 2.8 40 1.3 0.19
3 40 55 2.3 42 1.1 0.17
4 38 67 3.3 52 1.6 0.26
5 40 85 4.3 62 2.3 0.36
6 50 122 5.9 88 2.6 0.37
7 40 136 6.8 103 2.1 0.33
8 44 134 7.4 100 2.3 0.35
9 49 150 8.8 112 3.8 0.54
10 45 148 8.2 110 3.3 0.49
11 44 163 7.3 121 3.3 0.50
12 40 161 6.6 120 2.7 0.43
13 43 131 6.2 100 3.2 0.49
14 40 96 5.8 70 2.3 0.36
15 41 64 4.7 49 2.5 0.39
16 52 73 3.4 56 1.6 0.22
17 44 74 3.9 56 1.8 0.27
18 45 86 3.5 66 1.6 0.24
19 46 101 4.7 76 1.9 0.28
20 44 105 5.5 78 2.3 0.35
21 45 93 5.2 69 2.1 0.31
22 46 85 4.3 65 2.2 0.32
23 45 94 4.5 69 2.1 0.31
24 53 98 4.4 74 2.1 0.29
25 44 107 4.3 79 1.7 0.26
26 48 114 5.1 84 2.5 0.36
27 46 124 4.5 93 2.2 0.32
28 46 125 4.4 95 1.6 0.24
29 46 126 5.2 92 2.0 0.29
30 39 117 5.8 85 2.3 0.37
31 --- --- --- --- --- ---
Means:44.5104.7 78.2  
No. of Observations: 1335
No. of Observers: 79

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
10 AAP P.Abbott
27 ARAG G.Araujo
28 ATON A.Attanasio
15 BARH H.Barnes
20 BATR R.Battaiola
16 BERJ J.Berdejo
9 BLAJ J.Blackwell
19 BMF M.Boschat
25 BOJP P.Bojda
27 BRAB B.Branchett
14 BRAD D.Branchett
23 BRAR R.Branch
30 BROB R.Brown
2 BURS S.Burgess
23 BWJ J.Bohdanowicz
10 CAMP P.Campbell
17 CARJ J.Carlson
30 CHAG G.Morales
30 CKB B.Cudnik
17 CLZ C.Laurent
17 COMT T.Compton
29 CORA A.Coroas
25 CR T.Cragg
8 CVJ J.Carvajal
25 DEJV J.van Delft
4 DELS S.Delaney
15 DEMF F.Dempsey
25 DRAJ J.Dragesco
27 DUBF F.DuBois
10 FEEC C.Feehrer
18 FERJ J.Fernandes
6 FLET T.Fleming
24 GIOR R.Giovanoni
15 GOEM M.Goetz
7 GOLA A.Golovin
11 GOTS S.Gottschalk
7 HALB B.Halls
7 HAYK K.Hay
13 HRUT T.Hrutkay
17 JAMD D.James
6 JEFT T.Jeffrey
4 JENS S.Jenner
22 KAPJ J.Kaplan
15 KHAR R.Khan
21 KNJS J&S Knight
3 KROL L.Krozel
1 KUZM M.Kuzmin
15 LARJ J.Larriba
19 LERM M.Lerman
21 LEVM M.Leventhal
10 LUBT T.Lubbers
22 MALK K.Malde
24 MARJ J.Maranon
18 MCE E.Mochizuki
12 MILJ J.Miller
20 MMI M.Moeller
14 OBSO IPS Observatory
8 PARN N.Parker
22 RICE E.Richardson
16 RITA A.Ritchie
25 SCGL G.Schott
6 SCHG G.Scholl
2 SDP D.Sharples
12 SIMC C.Simpson
30 STAB B.Gordon-States
6 STEF G.Stefanopoulis
26 STEM G.Stemmler
29 STQ N.Stoikidis
14 SUZM M.Suzuki
14 SZAK K.Szatkowski
26 SZUM M.Szulc
25 TESD D.Teske
20 THR R.Thompson
9 TJV J.Temprano
21 VARG A.Vargas
23 VIDD D.Vidican
18 WILW W.Wilson
30 YESH H.Yesilyaprak
4 ZDM D.Zhdanok

Table III. Means of Raw Group Counts (RG) and Ratios of Spots to Groups (S:G) in June   2003
Day RG S:G Day RG S:G Day RG S:G Day RG S:G
1 3.4 5.6 9 5.4 17.8 17 4.8 5.4 25 6.6 6.2
2 3.4 6.2 10 5.1 19.0 18 5.3 6.2 26 7.4 5.4
3 3.3 6.7 11 5.6 19.1 19 5.4 8.7 27 8.2 5.1
4 4.2 6.0 12 6.1 16.4 20 4.8 11.9 28 7.9 5.8
5 5.2 6.4 13 6.1 11.5 21 4.0 13.2 29 7.9 6.0
6 6.8 7.9 14 5.3 8.1 22 4.0 11.3 30 6.9 7.0
7 6.8 10.0 15 4.0 6.0 23 5.0 8.8 31 --- ---
8 5.8 13.1 16 4.6 5.9 24 5.9 6.6 Mn. 5.5 9.1

Figure 1
Click image to enlarge.
Fig.1. 10 cm Solar Flux and Comparison of Ri (provisional) and Ra Estimates for June 2003 (r=0.980).
(Ri Source: http://sidc..oma.be/index.php3)
(10cm Source: http://www.drao.nrc.ca/icarus)

Figure 2
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

Sudden Ionospheric Disturbances (SID) Recorded During June 2003

(Analysis performed by Michael Hill, SID Analyst)
Date Max Imp Date Max Imp Date Max Imp
030601 0711 2 030609 2113 1 030612 0900 1-
030601 0751 1 030609 2137 1+ 030612 1006 1
030601 0905 2 030610 0001 2+ 030612 1027 1
030601 1251 2 030610 0837 1+ 030612 1148 2
030601 1259 2+ 030610 1104 2+ 030612 1407 2
030601 1653 2 030610 1113 2+ 030612 1712 1+
030601 1729 1 030610 1204 1+ 030612 2013 2
030601 2107 2 030610 1245 2+ 030612 2127 2
030602 0835 2 030610 1254 2+ 030613 0203 2
030602 1318 2 030610 1302 2+ 030613 0435 2
030602 1543 2+ 030610 1417 1 030613 0635 3
030602 1733 2+ 030610 1435 2 030613 0644 3+
030604 1537 2+ 030610 1625 1 030613 1452 2+
030606 1254 1 030610 1631 2 030613 1624 2+
030606 1316 1+ 030610 1816 2 030613 1734 2+
030606 1359 1 030610 1854 2 030613 2033 2+
030606 1618 1 030611 0450 2 030614 0535 3
030606 1746 1+ 030611 0553 2 030614 0558 3+
030608 0504 1 030611 0829 1+ 030616 1201 2+
030608 0612 1+ 030611 1101 2+ 030617 2154 1+
030608 0700 1 030611 1321 2 030617 2253 2+
030608 0746 1 030611 1529 2 030621 1314 1+
030608 1145 2 030611 1630 2+ 030624 0933 1+
030608 1610 2 030611 1743 2 030624 1024 1
030609 0908 1+ 030611 2006 2 030625 1554 2
030609 1111 2 030612 0118 2 030628 0656 1
030609 1128 2 030612 0129 3+ 030630 0735 2+
030609 1447 1 030612 0714 1 030630 0742 2+
030609 1633 1+ 030612 0813 1- 030630 0748 1+
030609 2059 1- 030612 0833 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
J Winkler A50 NAA NPM NPR
D Toldo A52 NAA NWC XXX
J Ellerbe A63 ICV
A Panzer A83 NAA
W Moos A84 FTA
M Hill A87 NAA
L Anderson A91 NWC
G DiFillipo A93 DHO
T Poulos A95 NAA
J Wallace A97 NAA
M King A99 HWU
P Campbell A100 NLK
F Steyn A102 NAA NWC
L Observatory A107 DHO
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)

SID ratings

Solar Events

June was indeed a very unusual month in comparison to what one expects from a sun receding into solar minimum. Whereas the last number of months have shown declining activity, this past month showed a sudden spike in activity with a SID event count of 89 correlated events. This is the kind of number we were seeing back when the sun was peaking. Even more unusual was that so many of the events happened during one predominant time interval from June 6th to June 13th. During this time alone there were 3 X-Class events with one more following a few days later. There were 226 X-Ray flares recorded by the GOES-12 satellite. Of these, 4 were X-Class and 32 were M-Class. Seventeen of the M-Class events occurred on June 9th and 10th. A couple of very busy days! This burst of activity was due to sunspot region 375, a very large grouping that many of us, I'm sure, studied visually over the last month as well. This grouping is a very long lived region that has persisted for longer than the 27 day solar rotation period so has therefore been seen crossing the surface two times now. Out of the 89 correlated SID events 49 of them were 2 and 2+ events with another five long duration 3 and 3+ events. So not only did we have a lot of events we also had a lot of very energetic events.

Solar Flare Summary
 
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