25 December 2019
⇐20191224 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20191226⇒

NOAA
2 Active Regions
12753
12754

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 E17S01
(-289",18") 		E32-W02
(34) 		4.7 0.1 1.4e20
2 W03S26
(46",-388") 		E21-W20
(41) 		4.3 -0.1 -1.3e20
3 E29S63
(-220",-852") 		E66-W73
(139) 		3.6 -0.6 -3.5e21
4 W11N11
(189",214") 		E03-W22
(25) 		2.2 0.0 1.5e19
5 W22N66
(151",903") 		E39-W68
(107) 		1.4 1.0 3.5e21
6 W58S16
(793",-249") 		W49-W64
(15) 		0.3 -0.6 -1.5e20
7 W19S04
(313",-41") 		W15-W22
(7) 		0.2 -1.1 -4.9e19
8 W50S20
(704",-315") 		W45-W54
(9) 		0.1 -1.0 -7.2e19
9 E34N20
(-509",360") 		E35-E32
(3) 		0.1 1.3 2.8e19
10 W50S34
(623",-529") 		W48-W53
(5) 		0.1 -1.9 -8.9e19

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 25-Dec-2019 20:30 UT .