28 April 2014
⇐20140427 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20140429⇒

NOAA
7 Active Regions
12042
12045
12047
12048
12049
12050
12044

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W30N49
(315",756") 		E12-W53
(65) 		3.5 0.1 5.6e32
2 W13S59
(114",-777") 		E03-W29
(32) 		0.6 -0.4 -2.2e32
3 W54S08
(766",-88") 		W51-W58
(7) 		0.1 6.8 4.8e32
4 W51N39
(573",639") 		W46-W55
(9) 		0.0 -0.9 -6.4e31

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 28-Apr-2014 23:35 UT .