[Ips-dsgr] SWS Daily Report - 28 April 19 issued 2330 UT on 28 Apr 2019
Regional Warning Centre
rwc at ips.gov.au
Mon Apr 29 09:30:20 EST 2019
SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/28 APRIL 2019 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 28 APRIL AND FORECAST FOR 29 APRIL - 01 MAY
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
-----------------------------------------------------------
1A. SOLAR SUMMARY
Activity 28 Apr: Very low
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 28 Apr: 68/2
1B. SOLAR FORECAST
29 Apr 30 Apr 01 May
Activity Very low Very low Very low
Fadeouts None expected None expected None expected
10.7cm/SSN 68/2 68/2 68/2
COMMENT: Solar activity was Very Low for UT day 28 April. There
are currently no sunspots on the solar disk visible from the
Earth. Solar activity is expected to remain Very Low for the
next 3 UT days, 29 April - 1 May. No Earth-directed CMEs were
observed in the available coronagraph imagery. On UT day 28 April,
the solar wind speed ranged between 350 km/s and 400 km/s, currently
near 380 km/s. The total IMF (Bt) varied mostly between 2 nT
and 5 nT. The north-south component of the IMF (Bz) varied in
the range -4/+3 nT without significant periods of negative Bz.
For the next UT day, 29 April, the solar wind speed is expected
to be mostly at background levels and can reach moderately elevated
levels due to minor coronal hole effects.
-----------------------------------------------------------
2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 28 Apr: Quiet
Estimated Indices 28 Apr : A K
Australian Region 2 11101111
Cocos Island 1 10001111
Darwin 2 11101111
Townsville 3 11111111
Learmonth 3 10102112
Alice Springs 2 01101111
Culgoora 3 11111111
Gingin 3 10102121
Canberra 1 10101110
Launceston 4 11212111
Hobart 3 10212111
Estimated Antarctic Regional K Indices 28 Apr :
Macquarie Island 2 10211001
Casey 5 22211211
Mawson 11 22211225
Davis 7 22320---
Observed Regional daily pc3 Indices 28 Apr :
Darwin 0 (Quiet)
Townsville NA
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 28 Apr : A
Fredericksburg 5
Planetary 5
Observed AFr/Ap Indices 27 Apr : A K
Fredericksburg 5
Planetary 5 1022 2122
2B. MAGNETIC FORECAST
Date Ap Conditions
29 Apr 7 Quiet
30 Apr 8 Quiet to Unsettled
01 May 13 Unsettled to Active
COMMENT: Geomagnetic activity was at Quiet levels across the
Australian region on UT day 28 April. Mostly Quiet levels were
observed in Antarctica on UT day 28 April. Global geomagnetic
activity is expected to be mostly at Quiet to Unsettled levels
for 29-30 April. On 1 May geomagnetic activity is expected to
increase and can reach active levels due to effects associated
with a recurrent coronal hole.
-----------------------------------------------------------
3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
28 Apr Normal Normal Normal-fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
29 Apr Normal Normal Normal-fair
30 Apr Normal Normal Normal-fair
01 May Normal Normal Normal-fair
COMMENT: Maximum usable frequencies (MUFs) ranged mostly from
near predicted monthly values to mildly enhanced levels over
the last 24 hours. Mostly normal HF conditions and near predicted
monthly MUFs are expected for the next three UT days, 29 April
- 1 May.
-----------------------------------------------------------
4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
28 Apr -0
Observed Australian Regional MUFs
Cocos Island Region:
Near predicted monthly values during local day.
Enhanced by 30% during local night.
Niue Island Region:
Depressed by 15% during local day.
Enhanced by 50% during local night.
Northern Australian Region:
Near predicted monthly values.
Southern Australian Region:
Near predicted monthly values during local day.
Enhanced by 25% during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
Monthly T index:
Month T index
Mar -7
Apr -12
May -12
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
29 Apr 0 Near predicted monthly values
30 Apr 0 Near predicted monthly values
01 May 3 Near predicted monthly values
COMMENT: Maximum usable frequencies (MUFs) ranged mostly from
near predicted monthly values to mildly enhanced levels during
the last 24 hours for Australian region. Sporadic E layers were
observed over most Australian region. Mostly normal HF conditions
and near predicted monthly MUFs are expected for the next three
UT days, 29 April to 1 May, in the Australian/NZ regions.
-----------------------------------------------------------
5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 27 Apr
Daily Proton Fluence >1 MeV: 6.1E+05
Daily Proton Fluence >10 MeV: 1.9E+04
Daily Electron Fluence >2 MeV: 2.00E+06 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 1%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: A5.9
DSCOVR Satellite Solar Wind Day Averaged Data for 27 Apr
Speed: 367 km/sec Density: 5.6 p/cc Temp: 39500 K Bz: -1 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
-----------------------------------------------------------
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
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 SWS. If you are not
the intended recipient, please contact the sender immediately
and delete all copies of this e-mail and attachments.
To unsubscribe from an IPS mail list either send an email to
"MAIL_LIST"-leave at ips.gov.au or go to
http://www.sws.bom.gov.au/mailman/listinfo/"MAIL_LIST".
Information about training can be obtained from
http://www.sws.bom.gov.au/mailman/listinfo/ips-training.
General information is available from
http://www.sws.bom.gov.au/mailman/listinfo/ips-info.
More information about the ips-dsgr
mailing list