[Ips-dsgr] SWS Daily Report - 23 July 17 issued 2330 UT on 23 Jul 2017 [SEC=UNCLASSIFIED]
Regional Warning Centre
rwc at ips.gov.au
Mon Jul 24 09:30:20 EST 2017
SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/23 JULY 2017 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 23 JULY AND FORECAST FOR 24 JULY - 26 JULY
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
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1A. SOLAR SUMMARY
Activity 23 Jul: Very low
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 23 Jul: 71/6
1B. SOLAR FORECAST
24 Jul 25 Jul 26 Jul
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 activity was very low over the last 24 hours.
The solar wind speed varied mostly between 520 km/s and 630 km/s
today (23 July UT day). The north-south component of the interplanetary
magnetic field,Bz, varied mostly between +/-5 nT during this
period. Solar wind speed is expected to show gradual weakening
over the next 24 hours. Very low levels of solar activity may
be expected for the next three days (24 to 26 July).
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 23 Jul: Quiet to Unsettled
Estimated Indices 23 Jul : A K
Australian Region 8 22332122
Darwin 8 22233112
Townsville 8 22233122
Learmonth 9 22332222
Alice Springs 8 22233122
Norfolk Island 7 22322112
Gingin 10 32232223
Camden 7 22322112
Canberra 6 11322112
Launceston 12 22433223
Hobart 9 22332222
Estimated Antarctic Regional K Indices 23 Jul :
Macquarie Island 21 21555212
Casey 22 33322346
Mawson 50 64543375
Observed Regional daily pc3 Indices 23 Jul :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 2 (Quiet)
Alice Springs 0 (Quiet)
Gingin 26 (Quiet to unsettled)
Canberra 43 (Unsettled)
Melbourne NA
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 International Center for Space Weather
Science and Education, Japan.
Estimated AFr/Ap Indices 23 Jul : A
Fredericksburg 11
Planetary 12
Observed AFr/Ap Indices 22 Jul : A K
Fredericksburg 18
Planetary 15 3244 2123
2B. MAGNETIC FORECAST
Date Ap Conditions
24 Jul 8 Quiet to Unsettled
25 Jul 5 Quiet
26 Jul 5 Quiet
COMMENT: Geomagnetic activity was at quiet to unsettled levels
across Australian region today (UT day 23 July). Nearly similar
levels of geomagnetic activity may be expected on 24 July. Geomagnetic
activity is expected to stay mostly at quiet levels on 25 and
26 July.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
23 Jul Normal Normal Normal
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
24 Jul Normal Normal Normal
25 Jul Normal Normal Normal
26 Jul Normal Normal Normal
COMMENT: MUFs were mostly near predicted monthly values over
the last 24 hours with periods of minor to mild enhancements.
HF conditions are expected to remain mostly normal during the
next three days (24 to 26 July).
-----------------------------------------------------------
4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
23 Jul 8
Observed Australian Regional MUFs
Cocos Island Region:
Mostly near predicted monthly values.
Northern Australian Region:
Near predicted monthly values during local day.
Enhanced by 15% during local night.
Southern Australian Region:
Near predicted monthly values.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Enhanced by 30% over the UT day.
Monthly T index:
Month T index
Jun 9
Jul 8
Aug 7
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
24 Jul 12 Near predicted monthly values
25 Jul 15 Near predicted monthly values
26 Jul 18 Near predicted monthly values
COMMENT: MUFs were mostly near predicted monthly values over
the last 24 hours in the Australian/NZ region with periods of
minor to mild enhancements. HF conditions in this region are
expected to remain mostly normal during the next three days (24
to 26 July).
-----------------------------------------------------------
5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 22 Jul
Daily Proton Fluence >1 MeV: 4.3E+07
Daily Proton Fluence >10 MeV: 1.5E+04
Daily Electron Fluence >2 MeV: 9.70E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability:10%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: A4.2
DSCOVR Satellite Solar Wind Day Averaged Data for 22 Jul
Speed: 574 km/sec Density: 6.2 p/cc Temp: 297000 K Bz: 0 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
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Space Weather Services email: asfc at bom.gov.au
Bureau of Meteorology
PO Box 1386 WWW: http://www.sws.bom.gov.au
Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp-out.sws.bom.gov.au
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