[Ips-msgr] IPS Monthly Report - September 03
rwc
rwc at ips.gov.au
Thu Oct 9 10:09:23 EST 2003
SUBJ: IPS MONTHLY SUMMARY - SEPTEMBER 2003
ISSUED BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
1. SOLAR-GEOPHYSICAL INDICES
SOLAR AUST AUST
Day 10 cm flux A-INDEX T INDEX
01-Sep 108 14 70
02-Sep 106 12 82
03-Sep 111 13 85
04-Sep 112 18 83
05-Sep 108 15 87
06-Sep 105 9 60
07-Sep 108 5 66
08-Sep 99 6 64
09-Sep 96 18 78
10-Sep 99 13 76
11-Sep 97 11 51
12-Sep 94 10 55
13-Sep 96 7 57
14-Sep 95 5 48
15-Sep 97 5 57
16-Sep 99 32 66
17-Sep 106 37 25
18-Sep 109 30 25
19-Sep 111 29 35
20-Sep 112 26 52
21-Sep 120 15 51
22-Sep 123 13 64
23-Sep 125 15 67
24-Sep 134 23 85
25-Sep 133 23 74
26-Sep 131 15 76
27-Sep 130 4 87
28-Sep 137 3 94
29-Sep 135 3 90
30-Sep 133 6 99
10 CM SUNSPOT SUNSPOT AUST AUST No of
FLUX NUMBER NUMBER A-INDEX T INDEX FLARES
Monthly Monthly Yearly Monthly Monthly >M1.0
Month Average Average Average Average Average
Sep 02 175.9 109.3 94.6 9.8 137.7 12
Oct 02 167.0 97.5 90.5 15.7 119.7 22
Nov 02 168.7 95.0 85.3 14.5 121.1 11
Dec 02 157.2 81.6 82.1 13.0 124.5 10
Jan 03 144.0 79.5 81.0 12.9 111.6 7
Feb 03 125.0 46.2 78.6 15.7 95.5 3
Mar 03 132.3 61.5 74.2 15.4 90.9 9
Apr 03 126.5 60.0 69.8p 14.7 88.7 15
May 03 116.7 55.2 66.0p 17.5 72.9 12
Jun 03 129.4 77.4 62.6p 16.3 75.4 43
Jul 03 127.8 85.0 59.7p 13.3 76.7 7
Aug 03 122.1 72.7 58.1p 16.2 68.4 4
Sep 03 112.3 48.8 57.1p 14.5 67.0 1
Monthly T indices
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1992 153 172 155 134 95 80 88 66 68 66 84 90
1993 74 77 79 63 63 64 62 50 37 40 34 43
1994 57 41 42 26 15 14 23 18 20 20 20 20
1995 24 33 23 13 3 11 13 10 13 9 13 7
1996 12 7 4 2 5 2 3 4 4 3 11 15
1997 14 11 10 8 11 5 9 17 32 27 28 38
1998 40 41 43 56 46 56 76 75 86 70 74 93
1999 94 81 89 77 98 124 124 105 89 92 123 113
2000 108 120 157 152 129 130 146 138 123 129 136 141
2001 130 131 135 123 112 132 112 113 144 151 156 162
2002 174 174 167 137* 128 119 111* 127* 129* 112 109 118
2003 112* 92* 82* 73 62* 73* 77* 60* 58^ 55^ 52^ 49^
2004 46^ 43^ 40^ 38^ 35^ 33^ 31^ 29^ 28^ 26^ 24^ 23^
2005 21^ 20^ 19^ 17^ 16^ 15^ 14^ 13^ 12^ 11^ 10^ 9^
2006 8^ 8^ 7^ 6^ 6^ 5^ 5^ 5^ 4^ 4^ 4^ 4^
2007 4^ 5^ 5^ 6^ 7^ 8^ 9^ 11^ 13^ 16^ 18^ 21^
2008 25^ 28^ 32^ 36^ 41^ 45^ 50^ 54^ 59^ 64^ 68^ 73^
* = New data. T index may have changed.
^ = IPS predicted T index.
The IPS Monthly T-index is derived from the observed monthly
median values of foF2 for each hour at up to 40 ionospheric
stations worldwide. These records become available from IPS
stations in Australia very soon after each month, but the
majority are received up to one year later. This means that
the exact observed value of the monthly T-index is not
available until some months later.
The predicted smoothed monthly T-indices are computed by
using a statistical analysis of the observed monthly T-indices
for all solar cycles since 1938. The IPS T-indices may not be
updated each month but only when sufficient new
data becomes available.
===============================================================================
2. FLARES AND SHORT-WAVE FADEOUTS
DATE CLASS M CLASS X FLARE FADEOUT POSSIBLE ON
FLARES FLARES MAX DAYLIGHT HF CIRCUIT
16 Sep 03 M1.3 2224UT
2.1 Comments on Solar Activity.
Solar activity was at low to very low levels this month, with
only one low level M class flare observed. Solar coronal holes
continued to feature on the solar disk.
===============================================================================
3. GEOMAGNETIC DISTURBANCES (for Australian Region)
DATE COMMENTS
04-05 Sep 03: Unsettled to Active
09-10 Sep 03: Quiet to Active
16-19 Sep 03: Active to minor storm conditions. Isolated severe
storm intervals on 17 Sep.
20-23 Sep 03: Unsettled to active. Isolated minor storm periods observed
on 20 Sep.
24-25 Sep 03: Unsettled to Minor Storm
Coronal hole high speed wind streams were the predominate cause of
activity during the month. Several minor filament eruptions may
also have contributed to activity, but mass ejection signatures
from these events were mostly indistinct. The most disturbed day
of the was observed on 17 Sep when the local A index reached 37.
===============================================================================
4. IONOSPHERIC DISTURBANCES (for Australian Region)
17 03: Southern region MUFs depressed 20%
18 03: Northern region MUFs depressed 12%
Southern region MUFs depressed 26%
19 03: Southern region MUFs depressed 18%
Depressed MUFs, mostly confined to the southern
Aus/NZ region, were observed during the interval
17-19 Sep, following coronal hole high speed
wind stream induced geomagnetic activity.
===============================================================================
5. IPS WARNINGS AND ALERTS ISSUED
WARNINGS:
HF RADIO WARNING:
ISSUE DATE NO BEGIN END
07 Sep 03 62 09 Sep 03 10 Sep 03
16 Sep 03 63 18 Sep 03 19 Sep 03
16 Sep 03 64 17 Sep 03 18 Sep 03
21 Sep 03 65 21 Sep 03 21 Sep 03
25 Sep 03 66 25 Sep 03 25 Sep 03
GEOMAGNETIC WARNING:
ISSUE DATE NO BEGIN END
05 Sep 03 41 08 Sep 03 10 Sep 03
12 Sep 03 42 14 Sep 03 15 Sep 03
16 Sep 03 43 17 Sep 03 19 Sep 03
21 Sep 03 44 21 Sep 03 21 Sep 03
24 Sep 03 45 24 Sep 03 24 Sep 03
ALERTS:
16 Sep 03: Geomagnetic
16 Sep 03: Flare Alert
17 Sep 03: Geomagnetic
18 Sep 03: Geomagnetic
19 Sep 03: Geomagnetic
20 Sep 03: Geomagnetic
24 Sep 03: Geomagnetic
25 Sep 03: Geomagnetic
SWF ALERTS AND DURATION REPORTS
DATE SWF BEGIN-END (UT)
None Issued.
IPS Radio and Space Services | email: asfc at ips.gov.au
PO Box 1386 | WWW: http://www.ips.gov.au
Haymarket NSW 1240 AUSTRALIA | FTP: ftp://ftp.ips.gov.au
tel: +61 2 9213 8010 | fax: +61 2 9213 8060
IMPORTANT: This e-mail, including any attachments, may contain,confidential
or copyright information. The views expressed in this message are those of
the individual sender, unless specifically stated to be the views of IPS.
If you are not the intended recipient, please contact the sender immediately
and delete all copies of this e-mail and attachments.
More information about the ips-msgr
mailing list