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Dr Jonathan Shock
@jonshock
37
Senior lecturer in mathematics and applied mathematics
Followers
71
Following
7
Resource Credits
Available
Used
Location
Cape Town
Website
http://www.mathemafrica.org
Created
2018-03-13 11:49
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jonshock
reading
2018-04-03 19:58
RE: The birds and the bees, and weekends of reading
With pleasure :-)
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jonshock
sundog
2018-04-01 21:48
RE: When your crystals are like plates, you get sundogs
Yes they are more common on cold days, but they can happen during the summer too. It just means that the ice can form at lower altitudes on a cold day.
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jonshock
sundog
2018-04-01 21:48
RE: When your crystals are like plates, you get sundogs
Yes they are more common on cold days, but they can happen during the summer too. It just means that the ice can form at lower altitudes on a cold day.
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jonshock
smartphonephotography
2018-03-25 16:31
RE: "Secret Sundog" My #smartphonephotography entry
In fact this is a 22 degree solar halo:
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jonshock
sundogphotography
2018-03-25 16:29
RE: What in Sam Hill is a Sun Dog? I'm so glad you asked!
That second image also has a really beautiful parhelic circle ( I wrote a post here explaining all about the sun dog. Let me know if it is useful.
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jonshock
ocd-resteem
2018-03-25 16:27
RE: Refraction Of Light On Ice Crystals (SUN DOG)
This is a lovely explanation. I also wrote a post here but I think that yours may be clearer.
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jonshock
news
2018-03-25 16:25
RE: Yukon SUNDOG blows away weather reporters, ‘MOST BEAUTIFUL THING I've SEEN'!
I wrote a post here explaining all about the sun dog. Let me know if it is useful.
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jonshock
sundog
2018-03-25 16:24
RE: Spectacular sun dog opposite the Sun
It's a beautiful one! I wrote a post here explaining all about the sun dog. Let me know if it is useful.
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jonshock
nature
2018-03-25 16:23
RE: UNIQUE FROZEN "SUNDOG" THIS MORNING
I wrote a post here explaining all about the sun dog. Let me know if it is useful.
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jonshock
news
2018-03-22 12:51
RE: Spectacular series of sun phenomena appear in the skies of northern Chile!
These are gorgeous. I've been taking photos of them and giving talks about these effects for years. Let me know if you have any questions. Yours sincerely, your friendly neighbourhood physicist.
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jonshock
nature
2018-03-22 12:49
RE: Strange Sky In Kuching: A Sign Of Things To Come?
Indeed this is from ice particles. They occur in relatively high altitude clouds where the temperature can be extremely low, even in tropical places. It's amazing what you can see when you know to look
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jonshock
nonprofit
2018-03-22 08:00
RE: [Effective Altruism #1] Introduction
I wrote a post introducing people a little to effective altruism, and offering a free book to those who want to know more...but so far nobody seems to want free books...what is happening in the world?
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jonshock
kr
2018-03-21 19:57
RE: [여행/말라위] #1 호수 아래로 지는 해를 볼 수 있는 곳, Cape Maclear
Stunning pictures :-)
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jonshock
photofeed
2018-03-21 16:18
RE: Solar Halo - a rare and spectacular optical phenomenon
They're not happening more often, but with digital photography, people are reporting them more and more.
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jonshock
photofeed
2018-03-21 16:17
RE: Solar Halo - a rare and spectacular optical phenomenon
This looks to me like a circumhorizon arc:
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jonshock
spanish
2018-03-21 16:10
RE: Solar halo
Absolute stunner!
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jonshock
solarhalo
2018-03-21 16:07
RE: The beauty of the 22 degree solar halo
Thank you :-)
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jonshock
photography
2018-03-21 15:49
RE: Crepuscular rays (Sun Rays) - Original photos of a cool natural phenomenon.
Have you ever looked out for anticrepuscular rays. They are the rays which meet back at the antisolar point. Mine taken at Muizenberg beach in Cape Town:
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jonshock
photography
2018-03-21 15:48
RE: Where Eagles Fly : Heaven Opening ~ Flying Amongst Crepuscular Rays Above The Rocky Mountains
Thank you for this post. It's lovely to see people sharing the beauty of these effects. Here are a couple of my own: Anticrepuscular rays in Muizenberg, South Africa And cloud shadow in Seoul, South Korea:
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jonshock
cape
2018-03-20 20:46
RE: Cape Town drought
I save all of the water from my washing machine (on the most economical setting it is around 60 liters), and use it to flush my toilet. I store it in 25 liter containers and add a little bleach to stop
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