23 April 2018
⇐20180422 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180424⇒

NOAA
3 Active Regions
12706
12704
12707

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 W00N47
(5",756") 		E52-W35
(87) 		7.2 0.5 2.5e33
2 E11S64
(-76",-824") 		E51-W53
(104) 		5.0 -1.1 -6.3e33
3 W06S50
(61",-673") 		W02-W08
(6) 		0.1 -0.8 -5.3e31
4 W49S46
(505",-646") 		W43-W57
(14) 		0.1 -1.1 -1.2e32

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-Apr-2018 15:30 UT .