21 April 2018
⇐20180420 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180422⇒

NOAA
3 Active Regions
12706
12704
12705

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 E04S63
(-30",-807") 		E73-W46
(119) 		5.1 -1.0 -5.1e33
2 E11N50
(-120",781") 		E63-W47
(110) 		3.8 0.6 2.1e33
3 E22N29
(-316",532") 		E34-E10
(24) 		1.4 0.8 4.9e32
4 W54N04
(771",116") 		W48-W62
(14) 		0.3 -1.5 -4.4e32
5 W63S08
(843",-86") 		W56-W66
(10) 		0.2 -1.1 -3.6e32
6 W54S34
(642",-493") 		W49-W60
(11) 		0.1 -1.6 -1.5e32
7 W18S20
(271",-249") 		W16-W19
(3) 		0.0 -2.3 -2.4e31

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 21-Apr-2018 15:30 UT .