[Ips-dsgr] SWS Daily Report - 30 July 22 issued 2330 UT on 30 Jul 2022 [SEC=OFFICIAL]
Regional Warning Centre
rwc at ips.gov.au
Sun Jul 31 09:30:54 EST 2022
SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/30 JULY 2022 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 30 JULY AND FORECAST FOR 31 JULY - 02 AUGUST
STATUS INDICATORS SOL:GREEN MAG:** YELLOW ** ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 30 Jul: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 30 Jul: 91/36
1B. SOLAR FORECAST
31 Jul 01 Aug 02 Aug
Activity R0 R0 R0
Fadeouts None expected None expected None expected
10.7cm/SSN 91/36 88/32 86/29
COMMENT: Solar activity on UT day 30-Jul was at the R0 level.
There are currently three numbered sunspot regions on the solar
disk. AR3068(S18E34, beta) has shown spot growth. A new unnumbered
region has developed near S20W16 and is currently classified
as beta. All other sunspot regions are either stable or in decay.
Solar activity is expected to be at the R0 level over 31-Jul
to 02-Aug. No geoeffective CMEs have been observed. The solar
wind speed on UT day 30-Jul ranged from 373 to 327 km/s, and
is currently near 350 km/s. The peak total interplanetary field
strength (IMF, Bt) was 11 nT and the north-south IMF component
(Bz) range was +8 to -6 nT. The solar wind speed is expected
to remain near background levels over 31-Jul to 01-Aug, possibly
increasing by late 02-Aug due to the effects of a high speed
wind stream from a south polar coronal hole that is currently
crossing the central meridian. .
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 30 Jul: G0
Estimated Indices 30 Jul : A K
Australian Region 4 11112211
Darwin 4 11112211
Learmonth 4 11112211
Alice Springs 3 11102211
Gingin 3 11112101
Canberra 2 01102100
Hobart 2 01112101
Estimated Antarctic Regional K Indices 30 Jul :
Macquarie Island 2 00022001
Casey 7 23222112
Mawson 13 23222225
Observed Regional daily pc3 Indices 30 Jul :
Darwin 0 (Quiet)
Townsville NA
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 2 (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 International Center for Space Weather
Science and Education, Japan.
Estimated AFr/Ap Indices 30 Jul : A
Fredericksburg 8
Planetary 8
Observed AFr/Ap Indices 29 Jul : A K
Fredericksburg 6
Planetary 4 2100 2111
2B. MAGNETIC FORECAST
Date Ap Conditions
31 Jul 8 G0
01 Aug 8 G0
02 Aug 16 G0
COMMENT: G0 geomagnetic conditions were observed in the Australian
and Antarctic regions on UT day 30-Jul. G0 geomagnetic conditions
are expected over 31-Jul to 02-Aug, with mildly disturbed conditions
possible from late 02-Aug due to the effects of coronal hole
high speed wind streams.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
30 Jul Normal-fair Normal Normal-fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
31 Jul Normal Normal Normal-fair
01 Aug Normal Normal Normal-fair
02 Aug Normal Normal Fair-normal
COMMENT: Mostly normal to mildly degraded HF conditions are expected
on 31-Jul to 02-Aug.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
30 Jul 48
Observed Australian Regional MUFs
Cocos Island Region:
Enhanced by 15% during local day.
Depressed by 35% during local night.
Depressed by 20% after local dawn.
Niue Island Region:
Depressed by 20% during local day.
Depressed by 30% during local night.
Northern Australian Region:
Near predicted monthly values during local day.
Depressed by 30% during local night.
Southern Australian Region:
Near predicted monthly values.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
Monthly T index:
Month T index
Jun 60
Jul 65
Aug 67
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
31 Jul 50 Near predicted monthly values, depressions of
10-20% at times in Northern Australian regions
01 Aug 50 Near predicted monthly values
02 Aug 50 Near predicted monthly values
COMMENT: Maximum usable frequencies (MUFs) on UT day 30-Jul were
mostly near predicted monthly values to 30% depressed in the
Australian region. Spread-F was observed in most Australian sites,
and sporadic-E was observed at Cocos Islands and Canberra. Ionospheric
conditions were degraded during local night hours in Northern
Australia, particularly near Darwin. The cause of these degraded
conditions is unknown. MUFs are expected to be near predicted
monthly values over 31-Jul to 02-Aug, with possible depressions
of 10-20% at times in the Northern Australian region. .
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 29 Jul
Daily Proton Fluence >1 MeV: 4.3E+04
Daily Proton Fluence >10 MeV: 3.0E+04
Daily Electron Fluence >2 MeV: 2.10E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 4%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B1.2
DSCOVR Satellite Solar Wind Day Averaged Data for 29 Jul
Speed: 370 km/sec Density: 7.3 p/cc Temp: 59400 K Bz: 2 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
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Australian Space Weather Forecasting Centre
Bureau of Meteorology
Level 2 Bice Building, Lot Fourteen Precinct, North Terrace, Adelaide SA 5000
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au
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