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July 8 99% of the world’s population in sunlight simultaneously?

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Re: July 8 99% of the world’s population in sunlight simultaneously?

#81

Post by schoen »

vlovich123 wrote: post #78

Not to be "that guy", but claiming that 4:15am in California (11:15 UTC) is daylight is really stretching it, at least going by this morning. Also sunrise here is ~5:50 AM. Even for a 7am meeting I typically need lights on in my office until partway through. The room has both eastern and southern exposure in the south-east corner (my desk is literally by the windows).

The article points out that it will be astronomical twilight, which most people aren't able to notice visually:

> This is especially true for those who reside on the outermost edge of the twilight zones, within the darkest twilight phase called astronomical twilight. Here, the Sun is 12-18 degrees below the horizon. At that angle, the indirect sunlight becomes so thin that it is usually indiscernible to the naked eye.

The article suggests 83% to 90% (not 99%) of people will find it to be light out (daylight or civil twilight) ... not including Californians.

Re: July 8 99% of the world’s population in sunlight simultaneously?

#82

Post by helloworld11 »

MacsHeadroom wrote: post #22
h2odragon wrote: post #10

When does the mega sunspot or whatever hafta fire a large mass ejection at us, and how strong would it have to be, to cook most of humanity?

The sun fires multiple ejections a day big enough to cook us. They just all miss. It would be like you stepping outside and shooting a bullet in a random direction a few times a day, with Earth being a golf ball miles away. The golf ball would be destroyed by a bullet. But your odds of hitting it are very low. Of course, over time the odds become an inevitability.

Your metaphor is totally off. For one thing, even the biggest CMEs aren't powerful enough to literally cook us. Partly because of solar size, distance and composition, and partly because our Earth has its own protections via the atmosphere, our robust electromagnetic field and a few atmospheric factors. Secondly, random bullets fired off in random directions remain as small dense objects. That metaphor works better for asteroids randomly bounding around the solar system. CMEs on the other hand expand and spread to pretty huge sizes as they fly outward into the Solar System. This makes them much more likely to arrive.

Re: July 8 99% of the world’s population in sunlight simultaneously?

#83

Post by keithnz »

yesenadam wrote: post #79
plasticchris wrote: post #2

Australia has less than 1% of the world population? Edit: yep, around 0.3%

A few years ago I wanted to make my movie-watching more representative of relative populations of countries, so I made this list. Most strikingly, about 4 movies in each 100 I watch should be from USA. Percentage of world population: China 18.5 - India 17.7 - USA 4.25 - Indonesia 3.5 - Pakistan 2.8 - Brazil 2.7 - Nigeria 2.6 - Bangladesh 2.1 - Russia 1.9 - Mexico 1.65 - Japan 1.6 - Ethiopia 1.5 - Philippines 1.4 - Eg…

Interestingly asking wolfram alpha to calculate it, you get a cool little graph showing a history.... https://www.wolframalpha.com/input?i=population+of+new+zeala...

Re: July 8 99% of the world’s population in sunlight simultaneously?

#84

Post by joebob42 »

mc32 wrote: post #44
firebaze wrote: post #29

Earlier quoted context omitted.

Quite probably only if we're ignoring the z-axis (depth), at least when talking over minerals. I think it will be a game-changer if a few km of rock won't be a hindrance anymore. If that ever comes, that is.

Some elements are kind of well distributed but not others: gold for example, or minerals or hydrocarbons, or even wind.

> elements

> Wind

I know you know and this is just stupid pedantry but it made me cackle

Re: July 8 99% of the world’s population in sunlight simultaneously?

#85

Post by JamesUtah07 »

vlovich123 wrote: post #78

Not to be "that guy", but claiming that 4:15am in California (11:15 UTC) is daylight is really stretching it, at least going by this morning. Also sunrise here is ~5:50 AM. Even for a 7am meeting I typically need lights on in my office until partway through. The room has both eastern and southern exposure in the south-east corner (my desk is literally by the windows).

Sunrise means that the sun is fully above the horizon. Dusk is when the sun light is starting to appear but the sun is still below the horizon. So yea I think the original 99% is experiencing daylight is from from accurate but almost everyone will be experiencing sunlight… technically.

Re: July 8 99% of the world’s population in sunlight simultaneously?

#86

Post by b112 »

yorwba wrote: post #67
spiralx wrote: post #33

Earlier quoted context omitted.

London has long benefitted from its position allowing its working day overlapping everywhere from the US West coast to Japan, even if barely at those extremes. Most of the world's population lies between UTC-5 and UTC+5 I believe.

Most of the world's population lives inside the Valeriepieris circle https://en.wikipedia.org/wiki/Valeriepieris_circle which is covered by the time zones UTC+5 through UTC+8. So if you want to be as close as possible to as many people as possible, somewhere in Myanmar would be a better choice than London. Of course the calculus changes if you also consider how much money each of these people has access to.

Most means "almost all". Your link says about 50%.

Re: July 8 99% of the world’s population in sunlight simultaneously?

#88

Post by xattt »

schoen wrote: post #81
vlovich123 wrote: post #78

Not to be "that guy", but claiming that 4:15am in California (11:15 UTC) is daylight is really stretching it, at least going by this morning. Also sunrise here is ~5:50 AM. Even for a 7am meeting I typically need lights on in my office until partway through. The room has both eastern and southern exposure in the south-east corner (my desk is literally by the windows).

The article points out that it will be astronomical twilight, which most people aren't able to notice visually: > This is especially true for those who reside on the outermost edge of the twilight zones, within the darkest twilight phase called astronomical twilight. Here, the Sun is 12-18 degrees below the horizon. At that angle, the indirect sunlight becomes so thin that it is usually indiscernible to the naked eye…

In the interest of cranking up the pedant-o-matic machine:

(1) If astronomical twilight and other indirect sunlight counts, then moonlight counts doubly so!

(2) If indirect and thus spatially separated sunlight counts, then temporally removed sunlight, in the form of airglow, should count as well!

Re: July 8 99% of the world’s population in sunlight simultaneously?

#89

Post by TheCoelacanth »

morepork wrote: post #63
morepork wrote: post #60

Earlier quoted context omitted.

Given India is UTC+5.5 and China is UTC+8, plus many other large countries are outside that range (Indonesia, Japan, Bangladesh, Mexico, Phillipines) I think you need to stretch it a bit

Given OP's 10 hour range, UTC+0 to UTC+10 is almost certainly going to be the 10 hour range that includes the most people. It includes all of Asia, Europe and Africa, and excludes both the Pacific and Atlantic oceans.

I think it has to be.

UTC+8 is all of China and UTC+5.5 is all of India, and in between are high population countries like Indonesia, Philippines, Vietnam, so UTC+5.5 to UTC+8 has to be included.

UTC+11 to UTC-8.5 is the Pacific Ocean and has maybe 10 million people total, while UTC+0 has >100 million in UK, Portugal and part of Western Africa so UTC+0 must be part of the range.

That only leaves the choice between UTC-1/2 and UTC+9/10. UTC-1 and UTC-2 have under a million with only a few small islands while UTC+10 has most of Papua New Guinea with 6 million.

Re: July 8 99% of the world’s population in sunlight simultaneously?

#90

Post by LanceH »

xattt wrote: post #88
schoen wrote: post #81

Earlier quoted context omitted.

The article points out that it will be astronomical twilight, which most people aren't able to notice visually: > This is especially true for those who reside on the outermost edge of the twilight zones, within the darkest twilight phase called astronomical twilight. Here, the Sun is 12-18 degrees below the horizon. At that angle, the indirect sunlight becomes so thin that it is usually indiscernible to the naked eye…

In the interest of cranking up the pedant-o-matic machine: (1) If astronomical twilight and other indirect sunlight counts, then moonlight counts doubly so! (2) If indirect and thus spatially separated sunlight counts, then temporally removed sunlight, in the form of airglow, should count as well!

Yes, being "in sunlight" and seeing reflected light from the sun are two different things.
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