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Wednesday, November 18, 2015

 

Geomagnetic Warning (18-19 November)

The Australian Space Weather Service (SWS formerly the IPS) has now  issued a Geomagnetic Warning in southern Australia from 18-19 November  from a CME impact. The NOAA site has a predicted G1 storm for 18-19 Nov (UT, 19 Nov AEDST)  In the last geomagnetic storm activity was seen in the early morning and is likley to be on the early morning of the 19th. In previous storms the best views were from 11:30 pm - 12:30 am but there was activity the following day. There is a strong possibility we will get unaided eye visible aurora in both Tasmania and the Southern mainland based on previous events. Evening skies will have minimal interference from the waxing Moon, cloud conditions are rubbish at the moment, but may clear on the 19th.

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 and a large green "blob" has been seen, and in quite a few of the recent ones we have had white "proton arcs".

Here is the near-real time satellite view of the clouds http://satview.bom.gov.au/
Cloud cover predictions can be found at SkippySky.  

The all sky aurora camera in Northern Tasmania at Cressy may be helpful.
<http://www.ips.gov.au/Geophysical/4/2>

Geomagnetic conditions are expected to rise from quiet to minor
storm levels on 18 November due to the expected effect of a high
speed solar wind stream from a coronal hole and possible glancing
blow from the CMEs observed late on 15 and early on 16 November.
This coronal hole effect may keep the conditions enhanced to
unsettled to minor storm levels on 19 November.

INCREASED GEOMAGNETIC ACTIVITY EXPECTED
DUE TO CORONAL HOLE HIGH SPEED WIND STREAM
FROM 18-19 NOVEMBER 2015
_____________________________________________________________

GEOMAGNETIC ACTIVITY FORECAST
18 Nov:  Quiet to minor storm
19 Nov:  Unsettled to minor storm



Further monitoring at
http://www.ips.gov.au

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Comments:
Hi thanks for logging the geomagnetic warning.
May explain some of the interesting phenomenon captured over Melbourne yesterday evening.
Through the inner city haze at 6pm you could see part of a red sun.
A strange hazy "cloud "cover had the effect where it filtered &broke the red sun shape into a red Triangle shape then a crescent so that only parts of this setting? Sun -a very red sphere -was visible at a time.
Took a great photo -the atmosphere and this hazy big cloud filter suddenly diminished and this red sun sphere clearly shows 3 yellow fiery sections in patches.
It is an interesting photo.
If looking for portents this fitted the bill :) However sun spot storms have also linked to geothermal activity - commonly known as earthquake weather. Should be interesting to see if this is the case.
Thx for the interesting blog: KatyQ

 
G'Day KatyQ

Sadly, those wonderful optical effects were the haze from the terrible bushfires in Western Australia, thinning sections of the haze are responsible for the different brightness of the regions of the Sun. Very spectacular, but caused by a tragic circumstance.
 
Good to know. Will forward. Thx Ian
 
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