[Ips-wsgr] IPS Weekly Solar and Geophysical Report (20 April 07)
rwc
rwc at ips.gov.au
Fri Apr 20 12:54:14 EST 2007
SUBJ: IPS WEEKLY SOLAR AND GEOPHYSICAL REPORT
ISSUED ON 20 APRIL 2007, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
1. SUMMARY (13 APRIL - 19 APRIL)
Date 13 14 15 16 17 18 19
10cm 68 68 69 69 69 69 68
AFr 1 3 2 0 6 6 ( 8)
Aaus 2 3 5 1 8 5 ( 5)
T 2 5 14 7 6 10 14
Solar: Solar flare activity
Geomagnetic: Geomagnetic activity observed for Australian Region.
Frequencies: Australian Ionospheric F2 critical frequencies
13 Apr
Solar: very low
Geomagnetic: Quiet
Frequencies:
Equatorial PNG/Niue Region:
Depressed by 15% during local day,
Depressed by 20% during local night.
Northern Australian Region:
Depressed by 15% during local day,
Depressed by 15% 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.
14 Apr
Solar: very low
Geomagnetic: Quiet
Frequencies:
Equatorial PNG/Niue Region:
Depressed by 20% during local day,
Near predicted monthly values during local night.
Northern Australian Region:
Depressed by 20% during local day,
Depressed by 20% during local night.
Southern Australian and New Zealand Region:
Depressed by 15% during local day,
Near predicted monthly values during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
15 Apr
Solar: very low
Geomagnetic: Quiet
Frequencies:
Equatorial PNG/Niue Region:
Depressed by 15 to 20%.
Northern Australian Region:
Near predicted monthly values.
Southern Australian and New Zealand Region:
Near predicted monthly values during local day,
Enhanced by 20% during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
16 Apr
Solar: very low
Geomagnetic: Quiet
Frequencies:
Equatorial PNG/Niue Region:
Depressed by 20%.
Northern Australian Region:
Mostly near predicted monthly values,
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.
17 Apr
Solar: very low
Geomagnetic: Quiet to Unsettled
Frequencies:
Equatorial PNG/Niue Region:
Depressed by 20% during local day,
Depressed by 15% during local night.
Northern Australian Region:
Mostly near predicted monthly values,
Southern Australian and New Zealand Region:
Near predicted monthly values.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Enhanced by 20% over the UT day.
18 Apr
Solar: very low
Geomagnetic: Quiet
Frequencies:
near predicted monthly values
19 Apr
Solar: very low
Geomagnetic: Quiet
Frequencies:
near predicted monthly values
2. FORECAST (20 APRIL - 26 APRIL)
Solar:
Low
Geomagnetic:
active on 21 Apr.
quiet to unsettled on other days.
Frequencies:
briefly depressed after local dawn on 22 Apr
MUFs near predicted monthly values on other days.
For an explanation of some of the terms in this report, goto
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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