17 May 2018
⇐20180516 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180518⇒

NOAA
1 Active Region
12709

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 E20N46
(-220",712") 		E33-W68
(101) 		5.9 0.8 3.2e33
2 W28S25
(407",-371") 		E00-W47
(47) 		5.2 0.0 3.9e31
3 E02S71
(-10",-881") 		E58-W72
(130) 		1.9 -1.2 -4.9e33
4 W53S09
(752",-124") 		W47-W61
(14) 		0.5 -0.5 -1.8e32
5 W16N07
(264",155") 		W14-W18
(4) 		0.0 -0.9 -1.0e31

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 17-May-2018 15:30 UT .