[Ips-wsgr] IPS Weekly Solar and Geophysical Report (25 September 09)
rwc
rwc at ips.gov.au
Fri Sep 25 12:14:31 EST 2009
SUBJ: IPS WEEKLY SOLAR AND GEOPHYSICAL REPORT
ISSUED ON 25 SEPTEMBER 2009, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
1. SUMMARY (18 SEPTEMBER - 24 SEPTEMBER)
Date 18 19 20 21 22 23 24
10cm 69 71 71 72 75 77 75
AFr 2 1 3 5 2 1 ( 2)
Aaus 4 3 5 8 5 2 ( 2)
T -7 -8 -5 -3 -9 -4 -4
Solar: Solar flare activity
Geomagnetic: Geomagnetic activity observed for Australian region.
Frequencies: Australian Ionospheric F2 critical frequencies
18 Sep
Solar: very low
Geomagnetic: Quiet with unsettled periods at high latitudes.
Frequencies:
Equatorial PNG/Niue Region:
Near predicted monthly values at Niue with some night
spread F. Near predicted monthly values at Vanimo with
depressions to 25% 05-15 UT.
Northern Australian Region:
Near predicted monthly values with depressions to 25%
04-06 UT at Darwin and 07-11, 15-18 UT at Cocos Is. No
data for Townsville.
Southern Australian and New Zealand Region:
Near predicted monthly values. Enhancements to 40%
at Canberra, Christchurch, Hobart and Sydney mostly
between 16-20 UT. Night spread F observed at Hobart.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values.
19 Sep
Solar: very low
Geomagnetic: Quiet with unsettled periods at high latitudes.
Frequencies:
Equatorial PNG/Niue Region:
Near predicted monthly values. Depressions to 30% at
Vanimo 07-20 UT.
Northern Australian Region:
Near predicted monthly values. Spread F observed at
Cocos Is. 15-22 UT. No data for Townsville.
Southern Australian and New Zealand Region:
Near predicted monthly values. Enhancements to 40% at
Canberra, Christchurch, Hobart and Sydney between
about 12-20 UT.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values.
20 Sep
Solar: very low
Geomagnetic: Quiet with unsettled periods at high latitudes.
Frequencies:
Equatorial PNG/Niue Region:
Near predicted monthly values. Depressions to 40%
observed at Niue 00-04, 11-17 and 20-21 UT.
Depressions to 25% at Vanimo 06-10 UT and to 50%
13-20 UT.
Northern Australian Region:
Near predicted monthly values. Depressions to 30%
observed at Darwin 04-07 UT. No Townsville data.
Southern Australian and New Zealand Region:
Near predicted monthly values. Enhancements to 60% at
times observed at Canberra, Christchurch, Hobart and
Sydney mostly 12-20 UT. Depressions to 20% observed at
Brisbane 00-06 UT and Norfolk Is. 07-14 UT.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values with enhancements to 30%
at Casey and Scott Base mostly 08-22 UT.
21 Sep
Solar: very low
Geomagnetic: Quiet to Unsettled
Frequencies:
Equatorial PNG/Niue Region:
Near predicted monthly values.
Northern Australian Region:
Depressed by 30% during local day,
Near predicted monthly values during local night.
Southern Australian and New Zealand Region:
Mostly near predicted monthly values,
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
22 Sep
Solar: very low
Geomagnetic: Quiet
Frequencies:
Equatorial PNG/Niue Region:
Depressed by 25% during local day,
Depressed by 35% during local night.
Depressed by 25% after local dawn.
Northern Australian Region:
Depressed by 30% during local day,
Near predicted monthly values during local night.
Southern Australian and New Zealand Region:
Near predicted monthly values.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
23 Sep
Solar: very low
Geomagnetic: Quiet
Frequencies:
Equatorial PNG/Niue Region:
Near predicted monthly values during local day,
Depressed by 15% during local night.
Depressed by 20% after local dawn.
Northern Australian Region:
Depressed by 25% during local day,
Near predicted monthly values during local night.
Southern Australian and New Zealand Region:
Mostly near predicted monthly values,
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
24 Sep
Solar: very low
Geomagnetic: Quiet
Frequencies:
Equatorial PNG/Niue Region:
Near predicted monthly values during local day,
Depressed by 20% during local night.
Northern Australian Region:
Depressed by 20% during local day,
Near predicted monthly values during local night.
Southern Australian and New Zealand Region:
Mostly near predicted monthly values,
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
2. FORECAST (25 SEPTEMBER - 01 OCTOBER)
Solar: Very Low solar activity is expected for the forecast
period. Current active regions have a small chance of producing a
C-class event.
Geomagnetic: Mostly Quiet to Unsettled conditions. Unsettled
conditions for 26Sep with possible Active periods due to
recurrent coronal hole effects.
Frequencies: MUFs near predicted monthly values for mid to high
latitudes. Depressions of 20% expected for low latitudes. Disturbed
conditions possible for high latitudes due to increased geomagnetic
activity 26Sep-27Sep.
For an explanation of some of the terms in this report, go to
http://www.ips.gov.au/1/2/1.
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
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