18 January 2017
⇐20170117 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170119⇒

NOAA
2 Active Regions
12625
12626

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 W17S21
(261",-274") 		E25-W37
(62) 		6.1 1.4 2.2e33
2 W35N54
(334",823") 		E26-W48
(74) 		3.0 0.6 3.3e33
3 W31N11
(499",263") 		W27-W37
(10) 		0.4 1.8 2.4e32
4 W25N03
(409",124") 		W23-W26
(3) 		0.1 9.5 1.6e32

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-Jan-2017 20:30 UT .