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Old 11-29-2012, 04:41 PM
 
Location: Paris
8,161 posts, read 8,693,011 times
Reputation: 3546

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Biggest I saw were a 14th of July in Paris. They showed up behind the Eiffel tower during the Bastille day fireworks and were visible till past midnight.

http://astrosurf.com/eternity/nlc/IM...mensionner.jpg
http://astrosurf.com/eternity/nlc/IM...mensionner.jpg


Btw...
Sunrise: 8:22 am
Sunset: 4:57 pm
Altitude at noon: 19.4°

 
Old 11-30-2012, 11:54 AM
 
Location: Estonia
1,759 posts, read 1,872,248 times
Reputation: 1109
I've seen them quite often in the summer as well. Near the solstice the sun only drops to 7° below the horizon so sky stays lit up all night. There can be massive cloudscapes illuminated from below by twilight, quite beautiful. Tough to even imagine it now with day length approaching 6 hours, heh.
 
Old 11-30-2012, 11:55 AM
 
Location: Gorgeous Scotland
4,105 posts, read 5,525,193 times
Reputation: 3351
Glasgow, Scotland
30th Nov. St. Andrew's Day

Sunrise: 08:22
Sunset: 15:49
 
Old 11-30-2012, 01:03 PM
 
Location: Harbor Springs, Michigan
2,294 posts, read 3,407,843 times
Reputation: 4654
Today in Wasilla Alaska
the sun will rise at 09:44
and it will set at 15:32
Solar noon is 12:49 @ 7.1°

giving us 6hrs 07mins of daylight
 
Old 11-30-2012, 01:08 PM
 
Location: Leeds, UK
22,118 posts, read 29,460,714 times
Reputation: 8819
Dec 1, 2012

Sunrise 08:01 Sunset 15:49
 
Old 11-30-2012, 01:12 PM
 
Location: Leeds, UK
22,118 posts, read 29,460,714 times
Reputation: 8819
Quote:
Originally Posted by Rozenn View Post
Biggest I saw were a 14th of July in Paris. They showed up behind the Eiffel tower during the Bastille day fireworks and were visible till past midnight.

http://astrosurf.com/eternity/nlc/IM...mensionner.jpg
http://astrosurf.com/eternity/nlc/IM...mensionner.jpg


Btw...
Sunrise: 8:22 am
Sunset: 4:57 pm
Altitude at noon: 19.4°
I've seen them here a few times too.

June 2007

 
Old 11-30-2012, 03:36 PM
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Location: Western Massachusetts
46,009 posts, read 53,177,863 times
Reputation: 15174
Quote:
Originally Posted by Rozenn View Post
Biggest I saw were a 14th of July in Paris. They showed up behind the Eiffel tower during the Bastille day fireworks and were visible till past midnight.
hmm website claims they're at 50-70°. I guess occasionally they sneak down below. I was at 47-49°N last summer, I wonder if I might have seen one without recognizing it?
 
Old 11-30-2012, 03:54 PM
 
Location: Paris
8,161 posts, read 8,693,011 times
Reputation: 3546
Apparently during the 2009 season they extended farther south than usual. Here you have a photo from Nebraska, much farther south than Paris, so you might get to see them in MA some day:
Invasion of the Noctilucent Clouds
ScienceDirect.com - Journal of Atmospheric and Solar-Terrestrial Physics - What caused the exceptional mid-latitudinal Noctilucent Cloud event in July 2009?
 
Old 11-30-2012, 07:43 PM
 
638 posts, read 1,022,263 times
Reputation: 551
Burlington,ON

Sunrise: 7:31am
Sunset: 4:45pm
 
Old 12-01-2012, 05:25 AM
 
Location: Gorgeous Scotland
4,105 posts, read 5,525,193 times
Reputation: 3351
Glasgow, Scotland
1 Dec

Sunrise: 08:24
Sunset: 15:48

Length of day: 7 hrs 24 mins
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