4 January 2024
⇐20240103 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20240105⇒

NOAA
4 Active Regions
13534
13536
13537
13538

Flare Forecast
Flare Prediction System
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E24S37
(-321",-540") 		E47-W21
(68) 		4.4 1.8 1.6e21
2 E37N48
(-392",756") 		E53-E23
(30) 		0.5 0.9 1.6e20
3 E26S61
(-210",-825") 		E39-E10
(29) 		0.4 0.3 4.4e19
4 E14N24
(-216",448") 		E15-E13
(2) 		0.1 2.2 2.0e19

Note: Solar Monitor's coronal hole segmentations are performed by CHIMERA, a copy of which is available at: github.com/TCDSolar/CHIMERA.

The operations of the CHIMERA algorithm is described in a peer reviewed paper: arxiv.org/abs/1711.11476.

An extensive copy of coronal hole properties are available at: solarmonitor.org/data.

The latest positions of the coronal holes are given in heliocentric co-ordinates, and the region positions are valid on 4-Jan-2024 20:30 UT .