21 May 2016
⇐20160520 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20160522⇒

NOAA
3 Active Regions
12544
12546
12547

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 W47N42
(514",654") 		E17-W64
(81) 		6.3 -0.2 -1.4e33
2 E33S17
(-492",-249") 		E43-E19
(24) 		0.6 1.6 3.3e32
3 W31S15
(480",-216") 		W27-W36
(9) 		0.5 -2.0 -3.4e32
4 W55N57
(419",808") 		W56-W57
(1) 		0.2 -1.0 -8.3e32

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 21-May-2016 23:17 UT .