Coronal Holes

[SpaceWhiskey]

In the recent tweet (Dec 4th), the coronal hole is described as "northern hemisphere coronal hole is facing Earth". However, these coronal holes which are facing earth are typically described as a "transequatorial coronal hole". My question is, why is this one described as northern hemisphere, when it appears to be transequatorial like many of the previous coronal holes tweeted by the SpaceWeatherLive team?

To expand on this, how do we visualize the equator of the sun from these Coronal Hole maps, and what is the hemispheric cutoff for a northern vs. transequatorial coronal hole.

 

Thanks team!

 

 

[Jesterface23]

It may have been just a poorly timed image where the bulk is north of the center point of the disk. There was a CME that closed most of the southern part of the CH briefly.

[Marcel de Bont]

Exactly. The tweets/alerts are automated and there are presets for three different sections. Northern hemisphere, trans equatorial and southern hemisphere. Is a majority of the CH detected in the northern zone it gets a northern hemisphere tag like with this detection. It might not be perfect but having all of this automated is just a blessing for us.

[SpaceWhiskey]

Thank you!

Good to know about it being automated, that's interesting. 

Cheers!