21 December 2018
⇐20181220 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20181222⇒

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 E43N11
(-651",201") 		E62-E27
(35) 		1.8 1.5 1.3e21
2 E28S66
(-183",-883") 		E65-W07
(72) 		1.5 -1.1 -3.3e21
3 W09N67
(60",909") 		E68-W63
(131) 		1.5 0.9 3.1e21
4 W13N11
(219",210") 		W04-W21
(17) 		0.9 -1.1 -2.1e20
5 W57S69
(297",-903") 		W39-W66
(27) 		0.1 -1.2 -8.0e20
6 W24N54
(236",808") 		W21-W28
(7) 		0.0 -1.0 -4.9e19

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 21-Dec-2018 20:30 UT .