25 December 2015
⇐20151224 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20151226⇒

NOAA
4 Active Regions
12470
12472
12473
12474

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 E25N52
(-253",786") 		E51-W10
(61) 		4.4 0.9 4.0e33
2 W45S62
(330",-846") 		E70-W61
(131) 		3.2 -1.2 -8.3e33
3 E07S19
(-106",-286") 		E12-W02
(14) 		0.4 1.2 1.1e32
4 E67N37
(-718",597") 		E69-E67
(2) 		0.1 -0.3 -1.3e32

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-2015 21:35 UT .