[Ips-msgr] IPS Monthly Report - August 01
rwc
rwc at ips.gov.au
Mon Sep 3 12:39:01 EST 2001
SUBJ: IPS MONTHLY SUMMARY - AUGUST 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-Aug 120 13 94
02-Aug 121 6 95
03-Aug 132 9 104
04-Aug 148 5 93
05-Aug 156 12 112
06-Aug 164 17 110
07-Aug 166 6 114
08-Aug 167 4 102
09-Aug 163 5 102
10-Aug 160 5 108
11-Aug 165 2 112
12-Aug 160 9 113
13-Aug 152 12 128
14-Aug 147 8 127
15-Aug 147 3 115
16-Aug 143 1 120
17-Aug 145 24 109
18-Aug 156 10 118
19-Aug 158 9 115
20-Aug 156 4 106
21-Aug 160 8 120
22-Aug 162 12 119
23-Aug 170 4 119
24-Aug 175 2 113
25-Aug 199 5 108
26-Aug 190 9 124
27-Aug 192 11 128
28-Aug 199 8 137
29-Aug 197 5 120
30-Aug 199 10 113
31-Aug 189 10 114
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
Aug 00 163.1 130.5 118.4 10.7 145.9 3
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 01 177.7 114.2 103.3p 14.0 142.6 36
Apr 01 178.3 108.2 103.6p 14.4 129.4 45
May 01 148.7 97.3 104.0p 7.1 118.0 11
Jun 01 173.7 134.0 104.0p 5.9 135.8 13
Jul 01 131.3 82.2 104.3p 6.5 113.6 2
Aug 01 163.2 106.8 105.5p 8.0 113.3 23
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* 133 147 140 124 131 137 140
2001 132* 130* 143* 123 112* 135* 114^ 111^ 108^ 105^ 103^ 100^
2002 97^ 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.
===============================================================================
2. FLARES AND SHORT-WAVE FADEOUTS
DATE CLASS M CLASS X FLARE FADEOUT POSSIBLE ON
FLARES FLARES MAX DAYLIGHT HF CIRCUIT
05 Aug 01 M1.7 1531UT
05 Aug 01 M4.9 2224UT 2216-2229UT
07 Aug 01 M1.1/SF 0737UT
21 Aug 01 M1.5 2157UT
22 Aug 01 M1.0 1216UT
24 Aug 01 M1.1/SF 0913UT
24 Aug 01 M1.2 2254UT
24 Aug 01 M3.5/1N 0017UT 2347-0044UT
25 Aug 01 M1.2/SF 0928UT
25 Aug 01 X5.3 /3B 1645UT 1623-1704UT 1623-1704UT
25 Aug 01 M1.2/SF 1956UT
25 Aug 01 M3.5/SF 0017UT 2347-0044UT
26 Aug 01 M1.3 1306UT
27 Aug 01 M1.9 0638UT
28 Aug 01 M1.0/1N 0012UT
28 Aug 01 M1.2/SF 0840UT
28 Aug 01 M1.1/1F 1611UT
29 Aug 01 M1.6/1F 0523UT
29 Aug 01 M1.2/1F 1253UT
30 Aug 01 M1.5/2N 1757UT
30 Aug 01 M3.0/1N 2038UT 2034-2041UT
31 Aug 01 M1.6/SN 1042UT
31 Aug 01 M2.9 2242UT
2.1 Comments on Solar Activity.
Solar activity was moderate on 05-06 Aug and 07 Aug due
to solar region 9557. This active region returned to the solar
disk later in the month as solar region 9591. This region
produced numerous M class events and the largest flare for
the month, an X5.3, at 1645UT on 25 Aug. Solar regions 9600
and 9601 also contributed to the increased flare activity
toward the end of the month. A total of 23 flares was
observed for the month.
Two proton events were observed during the month. The first
event was observed 1035-1435UT on 10 Aug, the second, stronger
event, began at 0140UT on 16 Aug and ended at 1535UT on 18 Aug.
Solar region 9591 in now in the far south-west of the solar
disk. Region 9600 and 9601 are currently near the centre of
the solar disk. These regions currently remain flare capable.
===============================================================================
3. GEOMAGNETIC DISTURBANCES (for Australian Region)
DATE COMMENTS
03 Aug 01: Unsettled to active
05-06 Aug 01: Unsettled to active, brief minor storm period.
12-14 Aug 01: Unsettled to active.
17 Aug 01: Minor storm levels second half of UT day.
21-22 Aug 01: Unsettled to active
27 Aug 01: Unsettled to active.
30 Aug 01: Unsettled to active.
The strongest disturbance for the month was observed on 17 Aug,
with the local A index reaching 24. This activity followed
a sudden impulse of 22nT at 1103UT on 17 Aug, and is believed
associated with a mass ejection/erupting solar filament on 14 Aug.
The X5 flare on 25 Aug was associated with a mass ejection that
produced a sudden impulse of 25nT at 1951UT on 27 Aug. However,
no significant activity followed this impulse, due to the north-south
component of the interplantary magnetic field remaining northward.
===============================================================================
4. IONOSPHERIC DISTURBANCES (for Australian Region)
17-18 Aug: Degraded conditions local night hours.
No Significant depressions were observed in the Asutralian/New
Zealand region this month. Northern hemisphere MUFs were
depressed 15-20% early in the UT day on 18 Aug.
===============================================================================
5. IPS WARNINGS AND ALERTS ISSUED
WARNINGS:
HF RADIO WARNING:
ISSUE DATE NO BEGIN END
01 Aug 01 35 01 Aug 01 02 Aug 01
03 Aug 01 36 03 Aug 01 04 Aug 01
07 Aug 01 37 07 Aug 01 09 Aug 01
10 Aug 01 38 12 Aug 01 13 Aug 01
15 Aug 01 39 17 Aug 01 18 Aug 01
18 Aug 01 40 18 Aug 01 18 Aug 01
24 Aug 01 41 27 Aug 01 28 Aug 01
24 Aug 01 42 25 Aug 01 28 Aug 01
31 Aug 01 43 01 Sep 01 02 Sep 01
GEOMAGNETIC WARNING:
ISSUE DATE NO BEGIN END
03 Aug 01 24 03 Aug 01 04 Aug 01
09 Aug 01 25 12 Aug 01 14 Aug 01
10 Aug 01 26 12 Aug 01 13 Aug 01
14 Aug 01 27 17 Aug 01 18 Aug 01
18 Aug 01 28 20 Aug 01 21 Aug 01
24 Aug 01 29 27 Aug 01 28 Aug 01
25 Aug 01 30 27 Aug 01 28 Aug 01
31 Aug 01 31 01 Sep 01 02 Sep 01
ALERTS:
03 Aug 01: Geomagnetic
05 Aug 01: Geomagnetic
05 Aug 01: Flare Alert
06 Aug 01: Geomagnetic
10 Aug 01: Proton
16 Aug 01: Proton
17 Aug 01: Geomagnetic
18 Aug 01: Geomagnetic
18 Aug 01: Proton
19 Aug 01: Geomagnetic
22 Aug 01: Geomagnetic
24 Aug 01: Flare Alert
25 Aug 01: Flare Alert
26 Aug 01: Flare Alert
27 Aug 01: Flare Alert
29 Aug 01: Flare Alert
30 Aug 01: Flare Alert
SWF ALERTS AND DURATION REPORTS: None Issued.
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