[Ips-dsgr] SWS Daily Report - 08 August 22 issued 2330 UT on 08 Aug 2022 [SEC=OFFICIAL]
Regional Warning Centre
rwc at ips.gov.au
Tue Aug 9 09:30:54 EST 2022
SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/08 AUGUST 2022 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 08 AUGUST AND FORECAST FOR 09 AUGUST - 11 AUGUST
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 08 Aug: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 08 Aug: 113/64
1B. SOLAR FORECAST
09 Aug 10 Aug 11 Aug
Activity R0, chance of R1 R0, chance of R1 R0, chance of R1
Fadeouts None expected None expected None expected
10.7cm/SSN 112/63 112/63 112/63
COMMENT: Solar activity on UT day 08-Aug was at the R0 level.
There are currently seven numbered sunspot regions visible on
the solar disk. AR3072 (S24W77, alpha) and AR3073 (S34W75, alpha)
will soon rotate over the western limb. Two unnumbered sunspot
regions are visible on the solar disk, one around S22E08 (beta)
and one around N31E49, the former has shown spot development
over the 24 hour period. All other sunspot regions are either
stable or in decay. Despite the large number of sunspot regions
solar activity has been low. Solar activity is expected to be
at the R0 level over 09-11 Aug, with a slight chance of R1. Several
CMEs were observed but none are considered geoeffective. The
solar wind speed on UT day 08-Aug was elevated due to equatorial
coronal hole high speed wind stream effects, ranging from 528
to 669 km/s, and is currently elevated near 580 km/s. The peak
total interplanetary field strength (IMF, Bt) was 14 nT, and
the north-south IMF component (Bz) range was +9 to -13 nT. The
solar wind speed is expected to remain elevated over 09-11 Aug
due to the ongoing effects of equatorial coronal hole high speed
wind streams.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 08 Aug: G0
Estimated Indices 08 Aug : A K
Australian Region 14 33333332
Darwin 13 33332332
Learmonth 16 33343333
Alice Springs 13 33332332
Gingin 16 33333343
Canberra 14 33433232
Hobart 17 33443332
Estimated Antarctic Regional K Indices 08 Aug :
Macquarie Island 30 33564433
Casey 22 44332453
Mawson 79 46743486
Observed Regional daily pc3 Indices 08 Aug :
Darwin 0 (Quiet)
Townsville NA
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 25 (Quiet to unsettled)
Canberra 40 (Quiet to unsettled)
Hobart 48 (Unsettled)
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 08 Aug : A
Fredericksburg 23
Planetary 30
Observed AFr/Ap Indices 07 Aug : A K
Fredericksburg 20
Planetary 23 1234 4445
2B. MAGNETIC FORECAST
Date Ap Conditions
09 Aug 15 G0, chance of G1
10 Aug 15 G0, chance of G1
11 Aug 15 G0, chance of G1
COMMENT: SWS Geomagnetic Warning 36 was issued on 8 August and
is current for 8-9 Aug. G0 geomagnetic conditions were observed
in the Australian region on UT day 08-Aug. G1 geomagnetic conditions
were observed in the Antarctic region, with an isolated period
of G2 at Macquarie and periods of G2-G4 at Mawson. G0 geomagnetic
conditions are expected over 09-11 Aug, with a chance of G1 due
to the ongoing effects of coronal hole high speed wind streams.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
08 Aug Normal Normal Normal-fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
09 Aug Normal Normal Normal-fair
10 Aug Normal Normal Normal-fair
11 Aug Normal Normal Normal-fair
COMMENT: Mostly normal HF conditions are expected on 09-11 Aug,
with mild degradations possible for high latitudes due to coronal
hole high speed wind stream effects.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
08 Aug 64
Observed Australian Regional MUFs
Cocos Island Region:
Near predicted monthly values during local day.
Depressed by 30% during local night.
Niue Island Region:
Near predicted monthly values.
Northern Australian Region:
Near predicted monthly values.
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
Jul 65
Aug 67
Sep 68
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
09 Aug 60 Near predicted monthly values
10 Aug 60 Near predicted monthly values
11 Aug 60 Near predicted monthly values
COMMENT: Maximum usable frequencies (MUFs) on UT day 08-Aug were
mostly near predicted monthly values, with mild depressions observed
in Darwin. Spread-F was observed in Brisbane and Townsville.
Sporadic E was observed in Brisbane, Cocos Islands and Perth.
MUFs are expected to be mostly near predicted monthly values
over 09-11 Aug, with mild degradations possible due to an increase
in geomagnetic activity.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 07 Aug
Daily Proton Fluence >1 MeV: 2.5E+05
Daily Proton Fluence >10 MeV: 3.2E+04
Daily Electron Fluence >2 MeV: 2.40E+06 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 1%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B4.5
DSCOVR Satellite Solar Wind Day Averaged Data for 07 Aug
Speed: 428 km/sec Density: 11.5 p/cc Temp: 90400 K Bz: -5 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
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Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au
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