25 December 2018
⇐20181224 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20181226⇒

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 W04N22
(60",396") 		E24-W25
(49) 		4.8 0.9 1.1e21
2 E22N60
(-177",865") 		E45-W70
(115) 		2.5 0.9 3.6e21
3 W27S70
(151",-905") 		E66-W47
(113) 		1.6 -0.9 -3.6e21

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-2018 20:30 UT .