21 April 2019
⇐20190420 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190422⇒

NOAA
1 Active Region
12739

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 W14S28
(198",-372") 		E22-W42
(64) 		9.4 -0.5 -1.2e21
2 W03S70
(15",-867") 		E72-W80
(152) 		2.4 -1.2 -4.9e21
3 E15N61
(-120",871") 		E51-W38
(89) 		1.6 1.0 3.1e21
4 E19S30
(-276",-409") 		E24-E15
(9) 		0.2 -1.2 -8.7e19
5 W26N24
(389",459") 		W24-W29
(5) 		0.1 -0.8 -4.5e19
6 W31S09
(489",-81") 		W29-W34
(5) 		0.1 1.2 2.7e19
7 W33S21
(490",-267") 		W30-W36
(6) 		0.1 -1.3 -2.4e19
8 W22N13
(345",289") 		W19-W25
(6) 		0.1 -0.7 -1.0e19
9 W27S14
(421",-157") 		W25-W29
(4) 		0.0 -0.9 -1.3e19
10 W48S58
(378",-772") 		W47-W49
(2) 		0.0 -1.7 -9.6e19

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-Apr-2019 22:00 UT .