22 April 2018
⇐20180421 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180423⇒

NOAA
4 Active Regions
12706
12707
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 E06N46
(-66",738") 		E43-W30
(73) 		6.9 0.5 2.3e33
2 E05S63
(-35",-812") 		E60-W45
(105) 		5.4 -1.2 -6.4e33
3 E35S33
(-465",-459") 		E41-E30
(11) 		0.1 -0.7 -4.1e31
4 E44S33
(-558",-468") 		E48-E40
(8) 		0.1 -1.2 -4.8e31

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 22-Apr-2018 15:30 UT .