24 September 2017
⇐20170923 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170925⇒

NOAA
1 Active Region
12681

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 E20N44
(-235",583") 		E42-W21
(63) 		14.6 0.8 5.3e33
2 W64N75
(223",904") 		W98-W91
(-7) 		0.3 1.1 2.1e33
3 W45S62
(318",-877") 		W39-W58
(19) 		0.3 -0.5 -9.2e32
4 W14N43
(176",564") 		W10-W18
(8) 		0.2 -0.7 -4.9e31
5 W21N43
(246",570") 		W18-W23
(5) 		0.0 -0.8 -1.4e31

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 24-Sep-2017 23:30 UT .