27 April 2014
⇐20140426 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20140428⇒

NOAA
5 Active Regions
12042
12045
12047
12038
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 W17N50
(178",774") 		E33-W43
(76) 		4.8 0.1 5.0e32
2 E36S65
(-237",-835") 		E45-W07
(52) 		0.7 -0.5 -6.0e32
3 W40S09
(607",-84") 		W35-W45
(10) 		0.4 10.5 1.9e33
4 E42N31
(-550",534") 		E45-E38
(7) 		0.1 -2.5 -2.0e32

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-2014 23:35 UT .