<p>I have three individual observations (unfortunately just remote) of the event, in which the <strong>extension of the solar eclipse can be observed in the twilight belt</strong>.
The observations I've managed to make apply to the following total solar eclipses: 2019,2020 and 2021.
The most spectacular was obviously the first one, where I clearly noticed how the umbra vanishes in the Earth's atmosphere. Moreover, I could spot the coincidence of the umbra with the Belt of Venus and Earth's shadow, as the event took place after sunset.</p>
<p><a href="https://i.sstatic.net/eFte1.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/eFte1.png" alt="enter image description here" /></a></p>
<p><a href="https://i.sstatic.net/udzeM.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/udzeM.png" alt="enter image description here" /></a></p>
<p>The most curious phenomenon was the difference in scattered light at the edge of the umbra (from bluish to strong reddish), which explanation you can find here, as well as other details of this report:
<a href="https://www.mkrgeo-blog.com/solar-eclipse-below-the-horizon-2019-the-worlds-first-webcam-observation/" rel="nofollow noreferrer">https://www.mkrgeo-blog.com/solar-eclipse-below-the-horizon-2019-the-worlds-first-webcam-observation/</a></p>
<p>In another case, I wasn't such fortunate as previously due to the webcams, which weren't recorded in live mode but only refreshed every 15 sec. Moreover, the one located close to the extended path was rotated, so I could effectively make the view of the same scene every 45s.
I've collected the image below including the potential situation at the greatest eclipse.
<a href="https://i.sstatic.net/97h64.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/97h64.jpg" alt="enter image description here" /></a></p>
<p>There were quite a lot of other observations at the same time, although they refer just to the partial phase of the eclipse. The details you can read here:
<a href="https://www.mkrgeo-blog.com/total-solar-eclipse-2020-remote-chasing-the-umbra-and-a-brief-explanation-how-do-the-webcams-work/" rel="nofollow noreferrer">https://www.mkrgeo-blog.com/total-solar-eclipse-2020-remote-chasing-the-umbra-and-a-brief-explanation-how-do-the-webcams-work/</a></p>
<p>Finally, I managed to capture the umbra passing inside of the Earth's shadow at solar depression over 4 degrees on December 2021.
<a href="https://i.sstatic.net/RSgsL.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/RSgsL.jpg" alt="Stanley (Falkland Islands) - total solar eclipse below the horizon - view at the antisolar direction - 4 degrees below the horizon" /></a>
Unfortunately, the common denominator was poor webcams, especially the last ones. Regardless of the image quality I managed to prepare the nomograph presenting the impact of the solar eclipse on the twilight.
<a href="https://i.sstatic.net/ASiuR.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/ASiuR.png" alt="enter image description here" /></a></p>
<p>Some YT records here:</p>
<p><div class="youtube-embed"><div>
                <iframe width="640px" height="395px" src="https://www.youtube.com/embed/IzA6K7Sgcec?start=48"></iframe>
            </div></div>
<div class="youtube-embed"><div>
                <iframe width="640px" height="395px" src="https://www.youtube.com/embed/LcaiM7ntWyM?start=0"></iframe>
            </div></div></p>

CC BY-SA 4.0
2023-04-21T08:21:35.397Z
2023-04-21T08:21:35.397Z
Geographos
<p>Has anyone observed the impact of the solar eclipse on twilight? I mean mostly the extension of the totality path in the atmosphere.</p>
<p>I mean the pattern below:
<a href="https://i.sstatic.net/pDcdU.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/pDcdU.png" alt="enter image description here" /></a></p>
<p>I - normal situation with total solar eclipse happening above the horizon
II - umbra meets the terminator, but the eclipse can be still visible by the observer
III - something like single-limit eclipse with umbra partially coincided with the Earth's shadow
IV - Eclipse is almost gone for an observer at the terminator line, but umbra still can be observed in the atmosphere
V - Umbra leaves the atmosphere
VI - Umbra is totally gone</p>
<p>I am wondering if it's anyone, who watched this phenomenon being further than the eclipse limit at sunrise or sunset. Because the twilight period including about 1500 nautical miles, any casual observer could see the impact of the eclipse in the atmosphere when the eclipse event itself isn't observed anymore (as it's geometrically below the horizon).</p>
<p>In general, an event such as this can be helpful in the following observations:</p>
<ul>
<li>near-sun objects,</li>
<li>solar F-corona</li>
<li>twilight standstill</li>
<li>others ???</li>
</ul>
<p>An example of one of the approaches is considered here:</p>
<p><a href="https://www.mkrgeo-blog.com/12p-pons-brooks-comet-during-2024-total-solar-eclipse/" rel="nofollow noreferrer">https://www.mkrgeo-blog.com/12p-pons-brooks-comet-during-2024-total-solar-eclipse/</a></p>
<p>I realize, that it's quite pointless traveling to the Twilight zone whereas flying just 1000km further you could enjoy a beautiful eclipse event, but... the question is predominantly for casual, local observers living in the areas, in which events such as these took place before!
The impact of the solar eclipse on twilight has practically the same frequency as the solar eclipse. For example in Europe, we have forthcoming 2 events on April 8, 2024, and August 12, 2026.</p>
<p>The sources about this phenomenon are rather scant. I found them maybe 8-10. Including historical observations. If anyone could come up with some nice links, which would help me to carry on studying about it, that would be great!</p>
<p>Any photos, links, scripts, and references will be cordially appreciated if anyone was fortunate to catch an event such as this.</p>

CC BY-SA 4.0
2023-04-19T17:57:51.430Z
I have voted to close as I cannot find a valid question in what you have posted. Are you looking for links on this phenomenon? Do you want confirmation you aren't the only one who has seen it? Or is it just a large post with a lot of links to your blog and videos trying to self-promote?
Rory Alsop
CC BY-SA 4.0
2023-04-20T13:48:58.237Z
Sorry mate, the question is in capitals beneath:
HAS ANYONE OBSERVED THIS PHENOMENON BEFORE?
Please read carefully.
Geographos
CC BY-SA 4.0
2023-04-20T17:14:14.990Z
I think I get what you are talking about.  Shortly after sunset, the sky remains "blue" as it is still in the sunlight.  But if an eclipse is occurring, the part of the sky may be in the moon's shadow. And part of the sky will then appear dark, after sunset, while other parts of the sky will appear "blue" as they are still illuminated by the sun.
James K
CC BY-SA 4.0
2023-04-20T17:15:29.817Z
I more aware of the "opposite" effect, where during an eclipse, the sky near the horizon is still lit by the sun even as the sky near the zenith goes dark.
James K
CC BY-SA 4.0
2023-04-20T19:03:12.757Z
Has anyone observed this before does not seem like a good question for this site. I would probably change my vote to "Opinion-based" as some people will say yes, and some will say no, and neither answer will help you
Rory Alsop
CC BY-SA 4.0
2023-04-21T08:25:14.553Z
OK guys, many thanks for your advice. I've rebuilt the query and now it has the Q & A style instead of A & Q. Anyhow I couldn't formulate it in a different way, as I certainly know how the event happens, but it seems like it's utter lack of any proofs even casual observations such as this.
Geographos
CC BY-SA 4.0
2023-04-24T15:10:11.707Z
Sadly no one has came up with some observations, that's a pitty
Geographos
<solar-eclipse><atmospheric-effects><brightness><twilight>
Solar eclipse impact on twilight
Geographos
# Solar eclipse impact on twilight

(Asked by: username_0 on 2023-04-18)

Has anyone observed the impact of the solar eclipse on twilight? I mean mostly the extension of the totality path in the atmosphere.

I mean the pattern below:
[![enter image description here](https://i.sstatic.net/pDcdU.png)](https://i.sstatic.net/pDcdU.png)

I - normal situation with total solar eclipse happening above the horizon
II - umbra meets the terminator, but the eclipse can be still visible by the observer
III - something like single-limit eclipse with umbra partially coincided with the Earth's shadow
IV - Eclipse is almost gone for an observer at the terminator line, but umbra still can be observed in the atmosphere
V - Umbra leaves the atmosphere
VI - Umbra is totally gone

I am wondering if it's anyone, who watched this phenomenon being further than the eclipse limit at sunrise or sunset. Because the twilight period including about 1500 nautical miles, any casual observer could see the impact of the eclipse in the atmosphere when the eclipse event itself isn't observed anymore (as it's geometrically below the horizon).

In general, an event such as this can be helpful in the following observations:

* near-sun objects,
* solar F-corona
* twilight standstill
* others ???

An example of one of the approaches is considered here:

<https://www.mkrgeo-blog.com/12p-pons-brooks-comet-during-2024-total-solar-eclipse/>

I realize, that it's quite pointless traveling to the Twilight zone whereas flying just 1000km further you could enjoy a beautiful eclipse event, but... the question is predominantly for casual, local observers living in the areas, in which events such as these took place before!
The impact of the solar eclipse on twilight has practically the same frequency as the solar eclipse. For example in Europe, we have forthcoming 2 events on April 8, 2024, and August 12, 2026.

The sources about this phenomenon are rather scant. I found them maybe 8-10. Including historical observations. If anyone could come up with some nice links, which would help me to carry on studying about it, that would be great!

Any photos, links, scripts, and references will be cordially appreciated if anyone was fortunate to catch an event such as this.

**Tags:** solar-eclipse, atmospheric-effects, brightness, twilight

> **Comments:**
> **username_1**: I have voted to close as I cannot find a valid question in what you have posted. Are you looking for links on this phenomenon? Do you want confirmation you aren't the only one who has seen it? Or is it just a large post with a lot of links to your blog and videos trying to self-promote?  
> **username_0**: Sorry mate, the question is in capitals beneath: HAS ANYONE OBSERVED THIS PHENOMENON BEFORE? Please read carefully.  
> **username_2**: I think I get what you are talking about.  Shortly after sunset, the sky remains "blue" as it is still in the sunlight.  But if an eclipse is occurring, the part of the sky may be in the moon's shadow. And part of the sky will then appear dark, after sunset, while other parts of the sky will appear "blue" as they are still illuminated by the sun.  
> **username_2**: I more aware of the "opposite" effect, where during an eclipse, the sky near the horizon is still lit by the sun even as the sky near the zenith goes dark.  
> **username_1**: Has anyone observed this before does not seem like a good question for this site. I would probably change my vote to "Opinion-based" as some people will say yes, and some will say no, and neither answer will help you  
> **username_0**: OK guys, many thanks for your advice. I've rebuilt the query and now it has the Q & A style instead of A & Q. Anyhow I couldn't formulate it in a different way, as I certainly know how the event happens, but it seems like it's utter lack of any proofs even casual observations such as this.  
> **username_0**: Sadly no one has came up with some observations, that's a pitty  

---

## 1 answers

### Answer by username_0 on 2023-04-21. Score: 2

I have three individual observations (unfortunately just remote) of the event, in which the **extension of the solar eclipse can be observed in the twilight belt**.
The observations I've managed to make apply to the following total solar eclipses: 2019,2020 and 2021.
The most spectacular was obviously the first one, where I clearly noticed how the umbra vanishes in the Earth's atmosphere. Moreover, I could spot the coincidence of the umbra with the Belt of Venus and Earth's shadow, as the event took place after sunset.

[![enter image description here](https://i.sstatic.net/eFte1.png)](https://i.sstatic.net/eFte1.png)

[![enter image description here](https://i.sstatic.net/udzeM.png)](https://i.sstatic.net/udzeM.png)

The most curious phenomenon was the difference in scattered light at the edge of the umbra (from bluish to strong reddish), which explanation you can find here, as well as other details of this report:
<https://www.mkrgeo-blog.com/solar-eclipse-below-the-horizon-2019-the-worlds-first-webcam-observation/>

In another case, I wasn't such fortunate as previously due to the webcams, which weren't recorded in live mode but only refreshed every 15 sec. Moreover, the one located close to the extended path was rotated, so I could effectively make the view of the same scene every 45s.
I've collected the image below including the potential situation at the greatest eclipse.
[![enter image description here](https://i.sstatic.net/97h64.jpg)](https://i.sstatic.net/97h64.jpg)

There were quite a lot of other observations at the same time, although they refer just to the partial phase of the eclipse. The details you can read here:
<https://www.mkrgeo-blog.com/total-solar-eclipse-2020-remote-chasing-the-umbra-and-a-brief-explanation-how-do-the-webcams-work/>

Finally, I managed to capture the umbra passing inside of the Earth's shadow at solar depression over 4 degrees on December 2021.
[![Stanley (Falkland Islands) - total solar eclipse below the horizon - view at the antisolar direction - 4 degrees below the horizon](https://i.sstatic.net/RSgsL.jpg)](https://i.sstatic.net/RSgsL.jpg)
Unfortunately, the common denominator was poor webcams, especially the last ones. Regardless of the image quality I managed to prepare the nomograph presenting the impact of the solar eclipse on the twilight.
[![enter image description here](https://i.sstatic.net/ASiuR.png)](https://i.sstatic.net/ASiuR.png)

Some YT records here:


---

