From anonymous at fakedomain.ips  Thu May  2 08:47:35 2013
From: anonymous at fakedomain.ips (anonymous)
Date: Thu, 2 May 2013 08:47:35 +1000
Subject: [Ips-aurora-sightings] Aurora sighting
Message-ID: <004501ce46bd$dfe9d550$9fbd7ff0$@fakedomain.ips

I believe my wife and I saw an aurora low in the sky today 1 May 2013 at
about 04:30 Australian Eastern Standard Time, roughly SSW. It was a green
glow about 5-10? above the horizon, with pink tinges low down. The sky was
clear of cloud, and we could see the Southern Cross and the Milky Way. The
air was still; and Mt Wellington had frost/snow on it this morning.

 

Arthur Sale

Howrah, Tasmania 

42.90038?S, 147.4138?E

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From anonymous at fakedomain.ips  Thu May  2 10:09:31 2013
From: anonymous at fakedomain.ips (anonymous)
Date: Thu, 02 May 2013 10:09:31 +1000
Subject: [Ips-aurora-sightings] aurora Hobart Tas
In-Reply-To: <000001ce4674$cee221c0$6ca66540$@fakedomain.ips
References: <000001ce4674$cee221c0$6ca66540$@fakedomain.ips
Message-ID: <5181AEBB.9080303@fakedomain.ips

Hello

Many thanks for the sighting. I mentioned southern Tasmania auroral 
sightings overnight in our daily report.
http://listserver.ips.gov.au/pipermail/ips-sf/2013-May/000573.html

The reason for this particular aurora was geomagnetic activity from a 
long (~24 hours) period of southward interplanetary (solar) magnetic 
field. When that happens the interplanetary field merges with the Earths 
geomagnetic field and a lot of solar wind energy is transmitted down the 
magnetic field lines into the polar upper atmosphere.  If you had a 
darker background the aurora may have looked green (from atomic oxygen 
energy transitions at ~200km altitude) but white or no colour is more 
usual with light pollution.

Cheers
IPS duty forecaster
Dave Neudegg


On 05/02/2013 12:04 AM, Wilkinson/Lynch wrote:
>
> Aurora visible in southern skies from Hobart at approx 23:35 local 
> time. Just appeared as a lighter area of sky without colour. Local 
> light pollution didn't help.
>
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From anonymous at fakedomain.ips  Thu May  2 10:24:16 2013
From: anonymous at fakedomain.ips (anonymous)
Date: Thu, 02 May 2013 10:24:16 +1000
Subject: [Ips-aurora-sightings] Aurora sighting
In-Reply-To: <004501ce46bd$dfe9d550$9fbd7ff0$@fakedomain.ips
References: <004501ce46bd$dfe9d550$9fbd7ff0$@fakedomain.ips
Message-ID: <5181B230.6080205@fakedomain.ips

Hello Arthur

Many thanks for the sighting. I mentioned southern Tasmania auroral 
sightings overnight in our daily report.
http://listserver.ips.gov.au/pipermail/ips-sf/2013-May/000573.html

The reason for this particular aurora was geomagnetic activity from a 
long (~24 hours) period of southward interplanetary (solar) magnetic 
field. When that happens the interplanetary field merges with the Earths 
geomagnetic field and a lot of solar wind energy is transmitted down the 
magnetic field lines into the polar upper atmosphere. So it was low on 
the horizon as it was located towards Antarctica.  The green colour is 
from atomic oxygen energy transitions at ~200km altitude. The pink/red 
at the bottom is from higher energy particles getting down to about 
110km altitude and causing energy transitions in other molecules like NO.


Cheers
IPS duty forecaster
Dave Neudegg


On 05/02/2013 08:47 AM, Arthur Sale wrote:
>
> I believe my wife and I saw an aurora low in the sky today 1 May 2013 
> at about 04:30 Australian Eastern Standard Time, roughly SSW. It was a 
> green glow about 5-10? above the horizon, with pink tinges low down. 
> The sky was clear of cloud, and we could see the Southern Cross and 
> the Milky Way. The air was still; and Mt Wellington had frost/snow on 
> it this morning.
>
> Arthur Sale
>
> Howrah, Tasmania
>
> 42.90038?S, 147.4138?E
>

-- 
IPS Radio and Space Services        email: asfc at fakedomain.ips
PO Box 1386                         WWW: http://www.ips.gov.au
Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp.ips.gov.au
tel: <SNIP>                fax: <SNIP>

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
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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
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Information about training can be obtained from http://listserver.ips.gov.au/mailman/listinfo/ips-training.
General information is available from http://listserver.ips.gov.au/mailman/listinfo/ips-info.


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From anonymous at fakedomain.ips  Thu May  2 11:37:20 2013
From: anonymous at fakedomain.ips (anonymous)
Date: Thu, 2 May 2013 01:37:20 +0000
Subject: [Ips-aurora-sightings] Aurora sighting 1 May Orielton Tasmania
Message-ID: <2AA4FA631804924FA0D8605F331805830203F7@fakedomain.ips

Observed between approx 2100 to 2300 from Orielton Tasmania
Faint curtain effect with searchlight beams.


Cheers

Claire Doran



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