29 April 2015
⇐20150428 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20150430⇒

NOAA
4 Active Regions
12327
12331
12333
12330

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E23N44
(-265",706") 		E68-W09
(77) 		7.4 1.6 8.8e33
2 E43N02
(-651",81") 		E53-E26
(27) 		1.0 -2.5 -1.3e33
3 W21S08
(335",-58") 		W13-W27
(14) 		0.8 7.0 1.3e33
4 W19N16
(292",333") 		W13-W24
(11) 		0.5 9.8 1.4e33
5 W42S78
(135",-916") 		E36-W76
(112) 		0.3 -0.6 -1.1e33
6 E59S74
(-222",-904") 		E77-E56
(21) 		0.1 -1.0 -4.6e32

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 29-Apr-2015 23:35 UT .