28 April 2015
⇐20150427 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20150429⇒

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 E28N44
(-317",709") 		E52-W01
(53) 		5.3 1.4 6.0e33
2 W07S09
(121",-75") 		E07-W14
(21) 		1.3 9.3 2.1e33
3 W03S78
(8",-916") 		E50-W62
(112) 		0.5 -0.6 -1.1e33
4 W07N16
(105",337") 		E02-W10
(12) 		0.5 5.0 5.9e32
5 W49S68
(269",-862") 		W26-W77
(51) 		0.3 -0.3 -3.6e32
6 E60N02
(-830",70") 		E67-E49
(18) 		0.3 -1.7 -5.4e32
7 E49N33
(-602",563") 		E77-E37
(40) 		0.2 -1.2 -2.9e32
8 E28N14
(-433",300") 		E31-E24
(7) 		0.2 -2.7 -1.5e32
9 E33N17
(-492",339") 		E35-E30
(5) 		0.1 -4.3 -9.4e31

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-2015 23:35 UT .