27 April 2018
⇐20180426 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180428⇒

NOAA
2 Active Regions
12706
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 W08S61
(61",-795") 		E81-W84
(165) 		6.0 -0.9 -5.0e33
2 E30N53
(-293",796") 		E67-W23
(90) 		4.2 0.5 3.1e33
3 E03N20
(-53",391") 		E12-W10
(22) 		2.7 0.3 2.4e32
4 W20N49
(211",760") 		W01-W40
(39) 		1.2 0.5 4.9e32
5 E17N18
(-259",365") 		E20-E12
(8) 		0.2 -0.7 -4.5e31
6 E24S23
(-352",-303") 		E27-E20
(7) 		0.1 -0.9 -3.3e31
7 W03S14
(51",-160") 		W01-W05
(4) 		0.1 -1.2 -1.3e31
8 W18S32
(258",-439") 		W16-W20
(4) 		0.1 -1.0 -1.8e31

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 27-Apr-2018 15:30 UT .