[Ips-msgr] IPS Monthly Report - September 01
rwc
rwc at ips.gov.au
Tue Oct 2 12:00:08 EST 2001
SUBJ: IPS MONTHLY SUMMARY - SEPTEMBER 2001
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 184 3 117
02-Sep 183 5 118
03-Sep 199 11 136
04-Sep 218 7 134
05-Sep 218 4 141
06-Sep 222 3 142
07-Sep 226 2 146
08-Sep 250 3 154
09-Sep 236 3 147
10-Sep 245 2 142
11-Sep 250 9 145
12-Sep 235 10 145
13-Sep 240 10 140
14-Sep 237 10 147
15-Sep 219 13 156
16-Sep 207 4 144
17-Sep 199 4 151
18-Sep 204 9 152
19-Sep 199 6 157
20-Sep 227 4 164
21-Sep 239 3 159
22-Sep 255 7 171
23-Sep 259 27 148
24-Sep 279 8 130
25-Sep 275 24 150
26-Sep 283 24 147
27-Sep 270 10 160
28-Sep 266 10 168
29-Sep 240 25 160
30-Sep 236 19 133
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 00 182.1 109.9 116.1 13.1 132.1 15
Oct 00 167.8 100.1 114.4 12.0 133.4 11
Nov 00 178.8 106.5 112.7 14.4 135.4 23
Dec 00 173.0 104.5 112.1 8.2 143.0 7
Jan 01 166.7 95.1 108.8 8.4 139.2 8
Feb 01 147.3 80.1 104.2 7.0 137.2 1
Mar 01 177.7 114.2 104.8 14.0 142.6 36
Apr 01 178.3 108.2 106.9p 14.4 129.4 45
May 01 148.7 97.3 107.3p 7.1 118.0 11
Jun 01 173.7 134.0 107.3p 5.9 135.8 13
Jul 01 131.3 82.2 107.6p 6.5 113.6 2
Aug 01 163.2 106.8 108.7p 8.0 113.3 23
Sep 01 233.3 150.7 108.9p 9.3 146.8 48
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 69 74 93
1999 94 82 89* 78 100* 124* 124 106* 89 91 123 113
2000 108 120* 158 154 133 133 147 140 124* 130* 137* 140*
2001 132 130 136* 123 111* 136* 104* 113* 109^ 106^ 104^ 101^
2002 98^ 96^ 94^ 92^ 90^ 88^ 86^ 84^ 81^ 79^ 76^ 74^
2003 71^ 69^ 66^ 64^ 61^ 59^ 57^ 54^ 52^ 49^ 47^ 45^
2004 43^ 41^ 39^ 37^ 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
02 Sep 01 M1.3/1F 0602UT
02 Sep 01 M1.1/SF 0624UT
02 Sep 01 M3.0/2N 1348UT 1341-1354UT
03 Sep 01 M1.1 1716UT
03 Sep 01 M2.5 1841UT
04 Sep 01 M1.8/1N 2017UT
04 Sep 01 M3.7/1N 2159UT 2153-2205UT
05 Sep 01 M6.0/2B 1432UT 1425-1434UT
05 Sep 01 M1.3/1N 1913UT
05 Sep 01 M2.2/SF 2233UT
07 Sep 01 M1.2/1F 1538UT
08 Sep 01 M1.2/SF 0457UT
08 Sep 01 M1.1/SF 1923UT
09 Sep 01 M1.9/2B 0240UT
09 Sep 01 M3.4/1N 1516UT 1510-1521UT
09 Sep 01 M2.2/SN 1526UT
09 Sep 01 M2.0/2B 1841UT
09 Sep 01 M9.5/2N 2045UT 2040-2048UT
11 Sep 01 M2.6 0111UT
11 Sep 01 M1.2 0704UT
11 Sep 01 M4.5/SF 2036UT 2025-2043UT
14 Sep 01 M3.7 2150UT 2141-2200UT
15 Sep 01 M1.5/1N 1128UT
15 Sep 01 M1.3/1F 1559UT
16 Sep 01 M5.6/2N 0353UT 0339-0418UT
17 Sep 01 M1.5/2N 0825UT
17 Sep 01 M8.1/1N 1550UT 1544-1554UT
17 Sep 01 M1.0/1N 2108UT
17 Sep 01 M1.0/2N 2146UT
18 Sep 01 M1.4/SF 0008UT
18 Sep 01 M1.3/1F 1538UT
18 Sep 01 M1.0 1552UT
18 Sep 01 M1.4/SF 1707UT
20 Sep 01 M1.5/SN 1817UT
23 Sep 01 M1.1/SN 1137UT
24 Sep 01 X2.6 /2B 1038UT 0932-1109UT
25 Sep 01 M1.1/SF 0148UT
25 Sep 01 M7.6/1N 0440UT 0424-0452UT
25 Sep 01 M2.0/1N 1027UT
26 Sep 01 M1.8 0258UT
27 Sep 01 M1.0 1213UT
28 Sep 01 M3.3/2N 0830UT 0810-0910UT
28 Sep 01 M2.4/1N 1014UT
28 Sep 01 M1.0/1F 1926UT
28 Sep 01 M1.2/1F 2125UT
29 Sep 01 M1.8/1F 1106UT
30 Sep 01 M1.0/SF 1141UT
30 Sep 01 M1.2 2136UT
2.1 Comments on Solar Activity.
Solar activity was at moderate to high levels this month,
with 48 flares observed. The largest flare for the month was an
X2.6 on Sep 24. Two proton events were observed, the first, in
association with the X2 flare was from 1235UT
on 24 Sep to 1100UT on 30 Sep. The second, smaller
event was observed from 1345-1425UT on 30 Sep, to
===============================================================================
3. GEOMAGNETIC DISTURBANCES (for Australian Region)
DATE COMMENTS
14 Sep 01: Unsettled to active. Sudden impulse of 21nT at 0207UT.
19 Sep 01: Unsettled to active. Sudden impulse of 23nT at 0223UT.
23 Sep 01: Quiet to Minor Storm. Sudden impulse of 16nT at 0930UT.
25 Sep 01: Quiet to Major Storm. Sudden impulse of 55nT at 2025UT.
26 Sep 01: Quiet to Major Storm.
29 Sep 01: Unsettled to Minor Storm. Sudden impulse of 25nT at 0939UT.
30 Sep 01: Quiet to Active. Sudden impulse of 18nT at 1924UT.
Disturbed conditions observed later in month in association
with coronal mass ejections.
===============================================================================
4. IONOSPHERIC DISTURBANCES (for Australian Region)
24 Sep 01: depressed 10-20% 00-06UT, southern region only.
Northern region Aus MUFs mostly enhanced 15-30% throughout
the month. No significant ionospheric depressions observed
on/after geomagnetically disturbed days, probably due to
seasonal factors.
===============================================================================
5. IPS WARNINGS AND ALERTS ISSUED
WARNINGS:
HF RADIO WARNING:
ISSUE DATE NO BEGIN END
04 Sep 01 44 04 Sep 01 06 Sep 01
07 Sep 01 45 07 Sep 01 09 Sep 01
09 Sep 01 46 10 Sep 01 12 Sep 01
18 Sep 01 47 19 Sep 01 21 Sep 01
24 Sep 01 48 24 Sep 01 24 Sep 01
25 Sep 01 49 25 Sep 01 27 Sep 01
25 Sep 01 50 26 Sep 01 27 Sep 01
28 Sep 01 51 29 Sep 01 01 Oct 01
30 Sep 01 52 30 Sep 01 02 Oct 01
GEOMAGNETIC WARNING:
ISSUE DATE NO BEGIN END
15 Sep 01 32 18 Sep 01 19 Sep 01
20 Sep 01 33 21 Sep 01 22 Sep 01
24 Sep 01 34 24 Sep 01 26 Sep 01
25 Sep 01 35 26 Sep 01 27 Sep 01
28 Sep 01 36 29 Sep 01 30 Sep 01
ALERTS:
02 Sep 01: Flare
03 Sep 01: Flare
04 Sep 01: Flare
05 Sep 01: Flare
08 Sep 01: Flare
09 Sep 01: Flare
11 Sep 01: Flare
14 Sep 01: Flare
15 Sep 01: Flare
16 Sep 01: Flare
17 Sep 01: Flare
23 Sep 01: Geomagnetic
24 Sep 01: Flare
24 Sep 01 Proton
25 Sep 01: Flare
25 Sep 01: Geomagnetic
26 Sep 01: Geomagnetic
26 Sep 01: Flare
28 Sep 01: Flare
29 Sep 01: Geomagnetic
29 Sep 01: Flare
30 Sep 01: Geomagnetic
SWF ALERTS AND DURATION REPORTS
DATE SWF BEGIN-END (UT)
16 Sep 01: SWF Alert (0344-0509 UT)
25 Sep 01: SWF Alert (0429-0539 UT)
IPS Radio and Space Services | email: asfc at ips.gov.au
PO Box 1386 | WWW: http://www.ips.gov.au/asfc
Haymarket NSW 1240 AUSTRALIA | FTP: ftp://ftp.ips.gov.au/users/asfc/
tel: +61 2 9213 8010 | fax: +61 2 9213 8060
More information about the ips-msgr
mailing list