27 May 2019
⇐20190526 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190528⇒

NOAA
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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 W11S18
(166",-270") 		25
(6.6e04) 		-0.1 3.6 2.4e21
2 W19S67
(123",-864") 		E74-W56
(130) 		2.2 -0.6 -2.7e21
3 W27N11
(418",192") 		W10-W43
(33) 		2.1 -0.8 -5.0e20
4 W34S24
(480",-365") 		W18-W45
(27) 		1.9 -0.9 -7.7e20
5 E32N68
(-187",886") 		E68-E12
(56) 		0.5 0.8 1.4e21
6 W23S41
(279",-607") 		W16-W29
(13) 		0.3 0.6 9.1e19
7 E01S54
(-10",-754") 		E03-W02
(5) 		0.0 -1.1 -3.9e19
8 W51N69
(258",891") 		W48-W68
(20) 		0.0 -0.7 -2.1e20
9 E07N25
(-105",417") 		E08-E05
(3) 		0.0 -1.2 -1.3e19

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 27-May-2019 22:20 UT .