<p>This morning I took this picture pointing East, just before Sun rise (also the Moon and Venus are visible there): there's a tilted blue vertical ray amidst the golden horizon: I suppose this can be a crepuscular ray passing through a not yet visible cloud, but I'm wondering if this can be another phenomenon...</p>
<p>Unfortunately I could not wait to see if there was a cloud with the Sun when it rose. What I can say is that there were no clouds visible in the sky at that moment.</p>
<p><a href="https://i.sstatic.net/BUmmZ.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/BUmmZ.jpg" alt="possible crepuscular ray, pointing East before Sun rise" /></a></p>

CC BY-SA 4.0
2023-09-13T11:34:17.407Z
For this kind of question, this website is a great resource: https://atoptics.co.uk/
Jean-Marie Prival
CC BY-SA 4.0
2023-09-15T06:39:32.563Z
Location is also of course always useful, though the availability of great satellite data may already be passing by
JeopardyTempest
CC BY-SA 4.0
2023-09-15T10:33:46.033Z
@JeopardyTempest : Are there so precise satellite data publicly available as to detect a single little cloud there?
circulosmeos
CC BY-SA 4.0
2023-09-15T10:35:35.507Z
@Jean-MariePrival : It's a great site indeed! but explanations are some times very brief, and I cannot interact to ask doubts ‍♀️
circulosmeos
CC BY-SA 4.0
2023-09-16T03:26:59.130Z
The current [US GOES](https://en.wikipedia.org/wiki/GOES-16) has 0.5-2 km resolution, which does help pick up individual clouds, especially when they are types more often setalone like cumulus (which I believe are most often responsible for crepuscular-related things for example).  [See here currently for exampling](https://weather.cod.edu/satrad/?parms=local-Georgia-truecolor-24-1-100-1&checked=map-glm_flash&colorbar=undefined) (better in daytime)
JeopardyTempest
<sun><atmospheric-optics>
name of this atmospheric phenomenon: possible crepuscular ray?
circulosmeos
# name of this atmospheric phenomenon: possible crepuscular ray?

(Asked by: username_0 on 2023-09-13)

This morning I took this picture pointing East, just before Sun rise (also the Moon and Venus are visible there): there's a tilted blue vertical ray amidst the golden horizon: I suppose this can be a crepuscular ray passing through a not yet visible cloud, but I'm wondering if this can be another phenomenon...

Unfortunately I could not wait to see if there was a cloud with the Sun when it rose. What I can say is that there were no clouds visible in the sky at that moment.

[![possible crepuscular ray, pointing East before Sun rise](https://i.sstatic.net/BUmmZ.jpg)](https://i.sstatic.net/BUmmZ.jpg)

**Tags:** sun, atmospheric-optics

> **Comments:**
> **username_1**: For this kind of question, this website is a great resource: https://atoptics.co.uk/  
> **username_2**: Location is also of course always useful, though the availability of great satellite data may already be passing by  
> **username_0**: @username_2 : Are there so precise satellite data publicly available as to detect a single little cloud there?  
> **username_0**: @username_1 : It's a great site indeed! but explanations are some times very brief, and I cannot interact to ask doubts ‍♀️  
> **username_2**: The current [US GOES](https://en.wikipedia.org/wiki/GOES-16) has 0.5-2 km resolution, which does help pick up individual clouds, especially when they are types more often setalone like cumulus (which I believe are most often responsible for crepuscular-related things for example).  [See here currently for exampling](https://weather.cod.edu/satrad/?parms=local-Georgia-truecolor-24-1-100-1&checked=map-glm_flash&colorbar=undefined) (better in daytime)  

---

## 0 answers

