[Ips-wsgr] IPS Weekly Solar and Geophysical Report (22 July 05)

[rwc]

SUBJ: IPS WEEKLY SOLAR AND GEOPHYSICAL REPORT 
ISSUED ON 22 JULY 2005, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (15 JULY - 21 JULY)
Date     15    16    17    18    19    20    21
10cm     87    76    74    72    71    72    73
AFr       4    10    15    19     8    14 ( 20)
Aaus      3     8    13    17     5    12 ( 15)
T        24    33    39    29    20    12    17

Solar:        Solar flare activity
Geomagnetic:  Geomagnetic activity observed for Australian Region.
Frequencies:  Australian Ionospheric F2 critical frequencies

15 Jul 
Solar:        very low
Geomagnetic:  Quiet 
Frequencies:  
   Equatorial PNG Region:
     Near predicted monthly values.
  Northern Australian Region:
     Near predicted monthly values.
  Southern Australian and New Zealand Region:
     Near predicted monthly values.
  Antarctic Region (Casey/Scott Base):
     Proton event in progress, increased absorption observed.

16 Jul 
Solar:        very low
Geomagnetic:  Quiet to Unsettled 
Frequencies:  
   Equatorial PNG Region:
     Near predicted monthly values during local day,
     Depressed by 15% during local night.
  Northern Australian Region:
     Near predicted monthly values.
  Southern Australian and New Zealand Region:
     Near predicted monthly values.
  Antarctic Region (Casey/Scott Base):
     Proton event in progress, increased absorption observed.

17 Jul 
Solar:        very low
Geomagnetic:  Quiet to Active 
A weak (12nT) impulse was observed in the IPS magnetometer data at 
	0137UT on 17 Jul.
Frequencies:  
slightly above predicted monthly values

18 Jul 
Solar:        very low
Geomagnetic:  Quiet to Minor Storm 
Frequencies:  
near predicted monthly values

19 Jul 
Solar:        very low
Geomagnetic:  Quiet 
Frequencies:  
slightly below predicted monthly values

20 Jul 
Solar:        very low
Geomagnetic:  Quiet to Active 
A weak (12nT) impulse was observed in the IPS magnetometer data at 
	1052UT on 20 Jul.
Frequencies:  
   Equatorial PNG Region:
      Depressed by 20% during local day,
      Near predicted monthly values during local night.
   Northern Australian Region:
      Depressed by 15% during local day,
      Near predicted monthly values during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Depressed by 15% during local night.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values over the UT day with
      periods of significant degradations.

21 Jul 
Solar:        very low
Geomagnetic:  Quiet to active with isolated minor storm recorded 
              on some stations. 
Frequencies:  
   Equatorial PNG Region:
      Near predicted monthly values during local day,
      Depressed by 30% during local night.
      Depressed by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Mostly near predicted monthly values,
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values over the UT day 
      with periods of significant degradations.

2. FORECAST (22 JULY - 28 JULY)
Solar: 
	Very low to low.

Geomagnetic:  
	Unsettled to active on 22 and 28 July. Mostly unsettled 
	on 23 July. Mostly quiet on the other days during this 
	period.

Frequencies:  
	Minor to moderate depressions in MUFs possible on 22, 
	23 and 28 July on high latitude and some mid latitude 
	locations.  MUFs near predicted monthly values on the
	other days.

PLEASE NOTE: 
At this time of the solar cycle, space weather conditions
are frequently determined by short timescale events, not
able to be forecasted a week in advance.

For an explanation of some of the terms in this report, goto
http://www.ips.gov.au, and follow links to Educational->
Gloassary on Solar Terrestrial Terms.


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