[Ips-dsgr] SWS Daily Report - 24 March 20 issued 2331 UT on 24 Mar 2020
Regional Warning Centre
rwc at ips.gov.au
Wed Mar 25 10:31:29 EST 2020
SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/24 MARCH 2020 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 24 MARCH AND FORECAST FOR 25 MARCH - 27 MARCH
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
-----------------------------------------------------------
1A. SOLAR SUMMARY
Activity 24 Mar: Very low
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 24 Mar: 71/6
1B. SOLAR FORECAST
25 Mar 26 Mar 27 Mar
Activity Very low Very low Very low
Fadeouts None expected None expected None expected
10.7cm/SSN 71/6 71/6 71/6
COMMENT: Solar activity was very low for UT day 24 Mar. There
are currently no numbered regions on the visible disk and no
earth-directed CMEs were observed in the available coronagraph
imagery. Solar activity is expected to be very low for the next
three days, 25-27 Mar. During UT day 24 Mar, the solar wind speed
was elevated, gradually decreasing from 470 km/s to 400 km/s,
currently near 420 km/s. The total interplanetary magnetic field
(Bt) stayed between 2 nT and 6 nT and the north-south component
of interplanetary magnetic field (Bz) varied in the range -3/+2
nT. The solar wind speed is expected to return to its background
levels for 25-27 Mar.
-----------------------------------------------------------
2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 24 Mar: Quiet
Estimated Indices 24 Mar : A K
Australian Region 1 20101000
Cocos Island 1 21100000
Darwin 2 20211000
Townsville 2 20111000
Learmonth 1 20101000
Alice Springs 1 20100000
Gingin 2 21101000
Canberra 0 10100000
Hobart 3 31111000
Estimated Antarctic Regional K Indices 24 Mar :
Macquarie Island 1 11111000
Casey 7 33321011
Mawson 15 53221034
Observed Regional daily pc3 Indices 24 Mar :
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 24 Mar : A
Fredericksburg 5
Planetary 5
Observed AFr/Ap Indices 23 Mar : A K
Fredericksburg 10
Planetary 10 3312 2232
2B. MAGNETIC FORECAST
Date Ap Conditions
25 Mar 7 Quiet
26 Mar 7 Quiet
27 Mar 7 Quiet
COMMENT: Quiet geomagnetic conditions were observed for the Australian
region on UT day 24 Mar with Antarctic regions experiencing mostly
quiet to unsettled conditions. For 25-27 Mar, mostly quiet global
geomagnetic conditions are expected.
-----------------------------------------------------------
3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
24 Mar Normal Normal Normal-fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
25 Mar Normal Normal Normal
26 Mar Normal Normal Normal
27 Mar Normal Normal Normal
COMMENT: Maximum usable frequencies (MUFs) were mostly near predicted
monthly values to mildly enhanced ones for UT day 24 Mar. MUFs
are expected to be mostly near predicted monthly values for the
next 3 UT days, 25-27 Mar.
-----------------------------------------------------------
4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
24 Mar 2
Observed Australian Regional MUFs
Cocos Island Region:
Near predicted monthly values during local day.
Enhanced by 15% during local night.
Niue Island Region:
Near predicted monthly values.
Northern Australian Region:
Mostly 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
Feb -8
Mar -15
Apr -16
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
25 Mar 0 Near predicted monthly values
26 Mar 0 Near predicted monthly values
27 Mar 0 Near predicted monthly values
COMMENT: Maximum Usable Frequencies (MUFs) ranged from near predicted
monthly values to mildly enhanced ones across Australian regions
on 24 Mar. MUFs are expected to be mostly near predicted monthly
values for 25-27 Mar with possible disturbed ionospheric support
for Antarctic regions.
-----------------------------------------------------------
5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 23 Mar
Daily Proton Fluence >1 MeV: 9.2E+04
Daily Proton Fluence >10 MeV: 4.6E+04
Daily Electron Fluence >2 MeV: 2.90E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 5%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: <A1.0
DSCOVR Satellite Solar Wind Day Averaged Data for 23 Mar
Speed: 472 km/sec Density: 7.4 p/cc Temp: 168000 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