18 February 2017
⇐20170217 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170219⇒

NOAA
1 Active Region
12636

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 E03S27
(-43",-329") 		E49-W70
(119) 		8.6 1.1 2.2e33
2 E10N60
(-85",896") 		E55-W40
(95) 		1.7 0.5 1.9e33
3 W17N42
(211",733") 		W09-W24
(15) 		0.4 0.5 1.4e32

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 18-Feb-2017 20:30 UT .