The SWS has issued a geomagnetic warning and aurora watch for 10-11 September
(UT) due to ongoing solar wind streams from a coronal hole. This anytime during
the UT day on the 10th, with activity extending out to the 11th. The SWS
predicts active conditions with the possibility of outbreaks of minor storms on
the 11th. It is not clear if the solar wind will impact during night time
hours, abut it would pay to be alert form twilight on the 11th..
If
these geomagnetic events occur and result in aurora they could be seen from
Tasmania weather permitting. The Moon is just past New and will not
significantly interfere with seeing aurora. Be patient, as the activity may rise
and fall of the magnetic polarity of the wind may fluctuate significantly.
This event is unlikely to be spectacular, but still worth a look as
viewing conditions are good (the Full Moon aurora on August 26 was good for
those with clear skies despite the Moonlight, as was very active despite initial
predictions of not much hapening).
Dark sky sites have the best chance
of seeing anything, and always allow around 5 minutes for your eyes to become
dark adapted.
As always look to the south for shifting red/green glows, beams
have been reported consistently over the last few aurora, as well as bright
proton arcs and "picket fences". A double arc, blobs, and curtains were seen in
Septembers aurora last despite the moonlight.
Here is the near-real
time satellite view of the clouds http://satview.bom.gov.au/
Cloud cover
predictions can be found at SkippySky.
A new
aurora camera is being installed at Campania, Tasmania. A live feed of the
images from this camera is still not available.
SUBJ: SWS GEOMAGNETIC
DISTURBANCE WARNING 18/19
ISSUED AT 0031UT/10 SEPTEMBER 2018
BY THE
AUSTRALIAN SPACE FORECAST CENTRE.
Geomagnetic activity is expected to
increase to Active levels
due to the arrival of CIR and HSS associated with
a recurrent
equatorial positive polarity coronal hole. A period of
significant
southward Bz component could produce Minor Storm
levels.
INCREASED GEOMAGNETIC ACTIVITY EXPECTED
DUE TO CORONAL HOLE
HIGH SPEED WIND STREAM
FROM 10-11 SEPTEMBER
2018
_____________________________________________________________
GEOMAGNETIC
ACTIVITY FORECAST
10 Sep: Quiet to Active. An isolated Minor Storm period is
also possible.
11 Sep: Active to Minor
Storm
_____________________________________________________________
SUBJ:
SWS AURORA WATCH
ISSUED AT 0047 UT ON 10 Sep 2018 by Space Weather
Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
Effects of a
coronal hole are expected to impact the Earth within the
next 24 hours,
possibly resulting in Minor Storm geomagnetic activity
and visible auroras
during local nighttime hours at high latitudes
such as Tasmania. Aurora
alerts will follow if significant geomagnetic
activity actually
occurs.
Visit the SWS Aurora webpage http://www.sws.bom.gov.au/Aurora for current
aurora
viewing conditions.
Our Aurora forecasting tool, located at
http://www.sws.bom.gov.au/Aurora/3/1, may help to estimate
regions
from where aurora would be visible.
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