24 August 2019
⇐20190823 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190825⇒

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Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W09S14
(139",-337") 		E07-W20
(27) 		3.9 -1.3 -8.1e20
2 E56N18
(-753",228") 		E68-E38
(30) 		1.7 1.1 5.0e20
3 W44N73
(193",877") 		E44-W91
(135) 		1.3 1.2 7.3e20
4 W08S66
(54",-906") 		E34-W31
(65) 		0.5 -0.9 -2.6e20
5 W19N45
(222",586") 		W11-W24
(13) 		0.2 -0.6 -2.7e19
6 W38N11
(576",82") 		W35-W41
(6) 		0.1 -0.9 -2.0e19
7 W33N12
(509",94") 		W32-W35
(3) 		0.0 -0.8 -6.5e18
8 W19S48
(212",-770") 		W18-W20
(2) 		0.0 -1.2 -1.4e19

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 24-Aug-2019 23:40 UT .