17 April 2019
⇐20190416 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190418⇒

NOAA
1 Active Region
12738

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 E46S68
(-253",-862") 		E72-W73
(145) 		1.9 -1.1 -5.4e21
2 W23N62
(175",882") 		E47-W37
(84) 		1.8 1.0 4.6e21
3 E11S46
(-129",-618") 		E19-E00
(19) 		0.5 -0.6 -1.5e20
4 W28N38
(357",652") 		W23-W35
(12) 		0.4 0.6 1.7e20
5 E24S29
(-348",-387") 		E30-E19
(11) 		0.3 -0.8 -9.6e19
6 E39S01
(-601",51") 		E42-E35
(7) 		0.1 -1.4 -3.4e19
7 E35S10
(-543",-90") 		E37-E32
(5) 		0.1 -1.6 -2.9e19
8 E29N01
(-464",95") 		E31-E27
(4) 		0.0 -0.7 -9.9e18
9 E15S08
(-249",-41") 		E16-E14
(2) 		0.0 -1.8 -1.4e19

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 17-Apr-2019 22:00 UT .