23 January 2017
⇐20170122 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170124⇒

NOAA
4 Active Regions
12625
12626
12627
12628

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 E23S11
(-380",-103") 		E38-E02
(36) 		3.6 1.1 9.9e32
2 W60S27
(749",-402") 		W47-W79
(32) 		0.8 1.3 1.2e33
3 W21N59
(183",875") 		W11-W44
(33) 		0.4 0.4 3.2e32
4 W08N67
(55",928") 		E12-W35
(47) 		0.3 0.3 3.5e32
5 E58S76
(-199",-931") 		E81-E55
(26) 		0.1 -0.9 -4.3e32

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 23-Jan-2017 20:30 UT .