[Ips-dsgr] SWS Daily Report - 29 April 18 issued 2330 UT on 29 Apr 2018 [SEC=UNCLASSIFIED]
Regional Warning Centre
rwc at ips.gov.au
Mon Apr 30 09:30:27 EST 2018
SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/29 APRIL 2018 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 29 APRIL AND FORECAST FOR 30 APRIL - 02 MAY
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
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1A. SOLAR SUMMARY
Activity 29 Apr: Very low
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 29 Apr: 71/6
1B. SOLAR FORECAST
30 Apr 01 May 02 May
Activity Very low Very low Very low
Fadeouts None expected None expected None expected
10.7cm/SSN 70/5 70/5 68/2
COMMENT: Solar activity was at very low levels today (UT day
29 April). No Earth-directed CMEs were observed in the available
imagery during the last 24 hours. The solar wind speed showed
a gradual decrease from 390 km/s to 350 km/s through the UT day
today. The IMF Bt varied mostly between 2 and 6 nT. The Bz component
of IMF showed variations between +5/-2 nT during most parts of
the day today, staying positive for longer periods of time. Very
low levels of solar flare activity are expected for the next
three UT days, 30 April-02 May.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 29 Apr: Quiet
Estimated Indices 29 Apr : A K
Australian Region 2 11111100
Cocos Island 2 11111100
Darwin 3 20111102
Learmonth 2 11111100
Alice Springs 2 11111100
Culgoora 2 11111101
Gingin 1 0110010-
Canberra 0 00100000
Launceston 1 01111100
Estimated Antarctic Regional K Indices 29 Apr :
Macquarie Island 0 00010000
Casey 3 12211100
Mawson 6 31211113
Observed Regional daily pc3 Indices 29 Apr :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 0 (Quiet)
Canberra 0 (Quiet)
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 29 Apr : A
Fredericksburg 4
Planetary 5
Observed AFr/Ap Indices 28 Apr : A K
Fredericksburg 5
Planetary 3 2110 1001
2B. MAGNETIC FORECAST
Date Ap Conditions
30 Apr 4 Quiet
01 May 4 Quiet
02 May 4 Quiet
COMMENT: Geomagnetic conditions were quiet across the Australian
region during the UT day 29 April. Geomagnetic conditions in
the region are expected to stay at quiet levels for the next
three days (30 April to 02 May).
-----------------------------------------------------------
3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
29 Apr Normal Normal Normal
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
30 Apr Normal Normal Normal
01 May Normal Normal Normal
02 May Normal Normal Normal
COMMENT: MUFs were mainly near predicted monthly values with
periods of minor to moderate MUF enhancements recorded in some
mid- and high-latitude areas on UT day 29 April. HF conditions
may be expected to stay mostly at normal levels for the next
three days (30 April to 02 May).
-----------------------------------------------------------
4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
29 Apr 6
Observed Australian Regional MUFs
Niue Island Region:
Near predicted monthly values.
Northern Australian Region:
No data available during local day.
No data available 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
Mar 2
Apr 2
May 1
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
30 Apr 5 Near predicted monthly values
01 May 5 Near predicted monthly values
02 May 5 Near predicted monthly values
COMMENT: MUFs were mainly near predicted monthly values over
most of the Aus/NZ region with periods of minor to moderate MUF
enhancements recorded in some southern areas on UT day 29 April.
HF conditions may be expected to stay mostly at normal levels
in the region for the next three days (30 April to 02 May).
-----------------------------------------------------------
5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 28 Apr
Daily Proton Fluence >1 MeV: 6.7E+05
Daily Proton Fluence >10 MeV: 1.8E+04
Daily Electron Fluence >2 MeV: 5.40E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 7%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: A2.6
DSCOVR Satellite Solar Wind Day Averaged Data for 28 Apr
Speed: 388 km/sec Density: 5.0 p/cc Temp: 155000 K Bz: 1 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
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Space Weather Services email: asfc at bom.gov.au
Bureau of Meteorology
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