23 December 2018
⇐20181222 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20181224⇒

NOAA
1 Active Region
12731

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 E25N16
(-403",296") 		E45-W00
(45) 		4.7 1.1 1.7e21
2 E04S69
(-25",-900") 		E72-W30
(102) 		1.7 -1.0 -3.5e21
3 W05N68
(33",915") 		E62-W66
(128) 		1.3 0.8 2.6e21
4 W26S55
(249",-780") 		W24-W33
(9) 		0.1 -1.5 -1.3e20

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 23-Dec-2018 20:30 UT .