25 April 2018
⇐20180424 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180426⇒

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 E04S65
(-30",-828") 		E73-W75
(148) 		4.8 -1.2 -6.4e33
2 E17N55
(-157",826") 		E58-W50
(108) 		4.3 0.7 4.0e33
3 W10S35
(138",-481") 		E11-W24
(35) 		2.0 -0.1 -6.9e31
4 E22S36
(-290",-500") 		E34-E02
(32) 		1.6 -0.2 -1.4e32
5 E28N26
(-402",482") 		E42-E20
(22) 		1.4 0.3 1.9e32
6 W49N36
(580",600") 		W40-W53
(13) 		0.4 0.5 2.7e32
7 E22N02
(-364",110") 		E29-E15
(14) 		0.4 1.1 1.0e32
8 E34S29
(-465",-409") 		E40-E27
(13) 		0.1 -1.2 -6.4e31
9 W40S10
(600",-105") 		W37-W43
(6) 		0.1 -1.4 -3.0e31
10 W29S52
(286",-709") 		W26-W31
(5) 		0.0 -2.3 -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 25-Apr-2018 15:30 UT .