[Ips-dsgr] IPS Daily Report - 22 December 10
rwc
rwc at ips.gov.au
Thu Dec 23 10:06:23 EST 2010
SUBJ: IPS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 22/2330Z DECEMBER 2010 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 22 DECEMBER AND FORECAST FOR 23 DECEMBER - 25 DECEMBER
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: ** YELLOW **
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1A. SOLAR SUMMARY
Activity 22 Dec: Very low
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 22 Dec: 78/17
1B. SOLAR FORECAST
23 Dec 24 Dec 25 Dec
Activity Very low Very low Very low
Fadeouts None expected None expected None expected
10.7cm/SSN 78/17 78/17 78/17
COMMENT: The visible solar disc is presently spotless. Solar
wind speed decreased from 355 to 300 km/s over the last 24 hours.
The interplanetary magnetic field (IMF) Bz component ranged between
+/-2 nT.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 22 Dec: Quiet
Estimated Indices 22 Dec : A K
Australian Region 2 11111101
Darwin 3 21111111
Townsville 0 10000100
Learmonth 3 11012201
Canberra 0 00000000
Hobart 1 00100101
Casey(Ant) 7 23321211
Observed Regional daily pc3 Indices 22 Dec :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice_Springs 0 (Quiet)
Gnangara 0 (Quiet)
Canberra 0 (Quiet)
Hobart 0 (Quiet)
Pc3 pulsations are high frequency (10-45 second period) variations
of the Earths magnetic field. Daily pc3-indices are the daily sum
of 20 minute pc3-indices for that station and have been shown to be
well correlated with rejection of high resolution aeromagnetic
survey flight-line data.
NOTE: Indices may have been generated from data obtained in
cooperation with the following organisations: Geoscience Australia,
University of Newcastle Space Physics Group, Australian Government
Antarctic Division and Space Environment Research Center, Japan.
Estimated AFr/Ap Indices 22 Dec : A
Fredericksburg 1
Planetary 2
Observed AFr/Ap Indices 21 Dec : A K
Fredericksburg 1
Planetary 1 0100 1000
2B. MAGNETIC FORECAST
Date Ap Conditions
23 Dec 2 Quiet
24 Dec 8 Quiet to Unsettled
25 Dec 4 Quiet
COMMENT: Observed Mostly Quiet conditions in the Australian/NZ
and Antarctic regions. Expect mostly Quiet conditions for the
next three days.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
22 Dec Normal Normal Normal
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
23 Dec Normal Normal Normal
24 Dec Normal Normal Normal-Fair
25 Dec Normal Normal Normal
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
22 Dec 9
Observed Australian Regional MUFs
Cocos Island Region:
Near predicted monthly values during local day,
Variable conditions during local night.
Niue Island Region:
Near predicted monthly values during local day,
Depressed by 15% during local night.
Northern Australian Region:
Near predicted monthly values 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.
Predicted Monthly T index for December: 34
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
23 Dec 10 near predicted monthly values/depressed 10 to
20%
24 Dec 10 near predicted monthly values/depressed 10 to
20%
25 Dec 10 near predicted monthly values/depressed 10 to
20%
COMMENT: MUFs were mildly depression at the mid to low latitudes,
particularly at night, due to a decrease in ionising radiation
resulting from very low solar activity for this period in the
solar cycle. Note, seasonal sporadic E may degrade communications
at times.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 21 Dec
Daily Proton Fluence >1 MeV: 7.1E+04
Daily Proton Fluence >10 MeV: 1.3E+04
Daily Electron Fluence >2 MeV: 2.50E+06 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 1%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: A3.5
ACE Satellite Solar Wind Day Averaged Data for 21 Dec
Speed: 377 km/sec Density: 2.9 p/cc Temp: 57400 K Bz: 0 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
ACE data can be incorrect during strong proton events.
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