From anonymous at fakedomain.ips Wed Jul 28 21:36:15 2004 From: anonymous at fakedomain.ips (anonymous) Date: Wed, 28 Jul 2004 21:36:15 +1000 Subject: Report of Aurora Observation Message-ID: From anonymous at fakedomain.ips Wed Jul 28 07:45:00 2004 From: anonymous at fakedomain.ips (anonymous) Date: Tue, 27 Jul 2004 22:45:00 +0100 Subject: Aurora Reports - Australian National VHF DX Group (ANVDG) Message-ID: <003501c47422$fc943d20$525e86cb@fakedomain.ips Radio Aurora has been noted in south east Australia at different times since the 22nd of July and the latest bout was yesterday 27th July from around 4pm endintg approx 2.30 am on the 28th. We are using 144 MHz Amateur Radio on SSB. Signals have been noted from VK7MO in Hobart to stations as far north as VK2KRR near Wagga NSW, as far west as VK5DK in Mt Gambier and VK5ZK near Adelaide. VK7MO has also been observing New Zealand television signals. Last night was the strongest so far in the session of Geomagnetic activity. Information is being posted on the ANVDG website at http://users.bigpond/anvdg/australian_aurora_scatter_studie.htm and this includes screen captures from Spectrogram and Spectran, showing the different effectes of the Aurora. Well worth a look. Thanks go to IPS for keeping us up to date with the current Space Weather. Regards Leigh Rainbird VK2KRR The Rock Hill NSW From anonymous at fakedomain.ips Wed Jul 28 22:16:29 2004 From: anonymous at fakedomain.ips (anonymous) Date: Wed, 28 Jul 2004 20:16:29 +0800 Subject: aurora observation Message-ID: <4107991D.3040101@fakedomain.ips Hi, A minor aurora was observed at 13:45:15 Universal Time (27/July/2004) from the Perth Observatory at -32.01 latitude and 116.136 east longitude. The aurora appeared on a survey image of an experimental night (star) camera. This device takes images of the night sky every 10 minutes at an altitude of 30 degrees and an azimuth of 145 degrees east. The aurora was extremely faint but had a curtain shape. Its mean altitude was 15 degrees altitude by 160 degrees azimuth. Every night the camera is in operation and its real time data can be viewed at http://wa/perthobs/CCDImage/ccd.html If you would like a copy of the extremely faint aurora, just ask. Cheers Arie Verveer Technical Manager Perth Observatory From anonymous at fakedomain.ips Thu Jul 29 11:00:15 2004 From: anonymous at fakedomain.ips (anonymous) Date: Thu, 29 Jul 2004 11:00:15 +1000 Subject: Aurora Report Message-ID: <2A9EF2791412E342B938C7F533762B010FF07F@fakedomain.ips Hello there, Having been a night sky watcher for much of my 45 years, and having witnessed numerous aurora events, I would like to report to you an aurora witnessed at 11:30 pm on Tuesday 27th July in the skys south/southeast of Wynyard in north west Tasmania. This was by a very long way the most spectacular aurora I have seen. Low in the southern sky was darkness, then at about 15 degree elevation was a relatively stable and narrow band of white light, much like the fringe of a shawl surrounding the darkest section close to the southern horizon. Above this, and extending to around 50 degree elevation were irregularly changing searchlight effects, with what appeared to be beams of light projecting upwards from the 'shawl' into the night sky. These were white coloured - not with the range of colours sometimes seen - and would come and go over a period of maybe 30 seconds to one minute. Typically there would be five or so spotlight effects in the sky at the one time. All of the above is pretty standard with regard to Auroras I have previously witnessed in this part of Tasmania. What was different - and to my mind quite exciting - was an additional layer of aurora activity, consisting of horizontal bands of light, a little like cloud bands, rising rapidly above the shawl effect to an elevation of around 75 degrees or perhaps slightly more, in a matter of two or three seconds. A bit like waves coming onto a beach, these bands of light repeatedly and rapidly washed up and over the southern night sky, and the whole southern sky appeared to be pulsing rapidly. The previously described spotlight effects were a backdrop to this display. The whole display was the brightest aurora I have witnessed, being clearly visible from inside my car as I drove westward with high beams on, even though the moon was about half full. I stopped and watched the display for about 15 minutes, and then resumed my drive westwards for a further 20 minutes. On arriving home, at the coastline, I again watched the display for a further 45 minutes, with all aspects of the display repeated, though with about half the brightness of that previously witnessed. Last night, when again the skys were very clear, I surveyed the southern skys between 9pm and 1 am, but did not observe any aurora activity. I would be interested to hear any comments you may have about these observations, in particular about the horizontal bands that pulsed in the southern sky. Greg Taylor Cradle Coast NRM Facilitator Western Region MOB: PH: FAX: PO Box 338 Burnie 7320