[Ips-dsgr] IPS Daily Report - 24 April 09
rwc
rwc at ips.gov.au
Sat Apr 25 09:27:32 EST 2009
SUBJ: IPS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 24/2330Z APRIL 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 24 APRIL AND FORECAST FOR 25 APRIL - 27 APRIL
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
-----------------------------------------------------------
1A. SOLAR SUMMARY
Activity 24 Apr: Very low
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 24 Apr: 70/5
1B. SOLAR FORECAST
25 Apr 26 Apr 27 Apr
Activity Very low Very low Very low
Fadeouts None expected None expected None expected
10.7cm/SSN 70/5 70/5 70/5
COMMENT: Solar wind parameters were mildly elevated, possibly
as a result of recent CME activity.
-----------------------------------------------------------
2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 24 Apr: Quiet to Unsettled
Estimated Indices 24 Apr : A K
Australian Region 7 32212222
Darwin 6 31212212
Townsville 8 32222222
Learmonth 9 32223222
Camden - --------
Canberra 4 21112111
Hobart 4 21112121
Casey(Ant) 7 22312212
Observed Regional daily pc3 Indices 24 Apr :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 2 (Quiet)
Alice_Springs 0 (Quiet)
Camden NA
Gnangara 4 (Quiet)
Canberra 0 (Quiet)
Hobart 2 (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 24 Apr : A
Fredericksburg 4
Planetary 5
Observed AFr/Ap Indices 23 Apr : A K
Fredericksburg 0
Planetary 3 0001 1121
2B. MAGNETIC FORECAST
Date Ap Conditions
25 Apr 5 Quiet
26 Apr 3 Quiet
27 Apr 3 Quiet
COMMENT: A weak sudden impulse in solar wind speed was observed
at the ACE satellite platform early in the UT day, followed by
moderate (+/-5 nT) fluctuations in IMF Bz. This resulted in occasional
periods of unsettled geomagnetic conditions at some stations.
The impulse may have been due to a glancing blow from CME activity
observed over recent days. Geomagnetic conditions should decline
to mostly quiet for the forecast period.
-----------------------------------------------------------
3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
24 Apr Normal Normal Normal
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
25 Apr Normal Normal Normal
26 Apr Normal Normal Normal
27 Apr Normal Normal Normal
-----------------------------------------------------------
4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
24 Apr -3
Observed Australian Regional MUFs
Equatorial PNG/Niue Region:
Depressed by 15% during local day,
Near predicted monthly values during local night.
Depressed by 20% after local dawn.
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.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Enhanced by 30% over the UT day.
Predicted Monthly T index for April: 3
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
25 Apr 0 Near predicted monthly values
26 Apr 3 Near predicted monthly values
27 Apr 3 Near predicted monthly values
COMMENT: Daytime depressions observed Equatorial/N Aus regions.
Periods of weak ionospheric conditions observed at some stations
Antarctic region mainly local night. Otherwise conditions mostly
normal. Expect mostly normal conditions next three days.
-----------------------------------------------------------
5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 23 Apr
Daily Proton Fluence >1 MeV: 7.6E+05
Daily Proton Fluence >10 MeV: 1.9E+04
Daily Electron Fluence >2 MeV: 4.00E+06 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 1%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: A1.0
ACE Satellite Solar Wind Day Averaged Data for 23 Apr
Speed: 366 km/sec Density: 1.2 p/cc Temp: 41700 K Bz: 1 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
ACE data can be incorrect during strong proton events.
-----------------------------------------------------------
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
IMPORTANT: This e-mail, including any attachments, may contain,
confidential or copyright information. The views expressed in
this message are those of the individual sender, unless
specifically stated to be the views of IPS. If you are not
the intended recipient, please contact the sender immediately
and delete all copies of this e-mail and attachments.
Occasionally IPS sends email promoting IPS products and
services to its mailing list customers. If you do not wish to
receive this promotional material please email
no-spam at ips.gov.au with the subject header:UNSUBSCRIBE"
More information about the ips-dsgr
mailing list