23 September 2017
⇐20170922 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170924⇒

NOAA
2 Active Regions
12680
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 E28N42
(-336",567") 		E57-W05
(62) 		12.6 1.0 6.4e33
2 W33S62
(246",-884") 		W00-W52
(52) 		0.8 -0.9 -2.5e33
3 W63N73
(255",889") 		W33-W86
(53) 		0.6 0.7 2.1e33
4 W43S15
(627",-328") 		W38-W52
(14) 		0.5 -1.2 -3.5e32
5 W02N45
(24",586") 		E03-W05
(8) 		0.1 -1.6 -8.6e31
6 W44S46
(458",-747") 		W37-W48
(11) 		0.1 -0.6 -1.1e32

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-Sep-2017 23:30 UT .