26 August 2019
⇐20190825 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190827⇒

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Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E32N20
(-477",227") 		E60-E10
(50) 		3.9 1.7 1.2e21
2 E38N65
(-245",816") 		E81-E05
(76) 		1.7 1.0 6.0e20
3 E29S11
(-451",-279") 		E36-E20
(16) 		1.6 1.4 3.9e20
4 W30S12
(462",-297") 		W21-W38
(17) 		1.4 -1.9 -5.2e20
5 W67N71
(280",878") 		W67-W91
(24) 		0.2 1.0 1.2e20
6 W27N06
(432",1") 		W24-W30
(6) 		0.1 -1.7 -4.2e19
7 W31S70
(168",-919") 		W20-W45
(25) 		0.1 -1.3 -5.6e19
8 W37S29
(500",-533") 		W34-W42
(8) 		0.0 -2.2 -2.1e19

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 26-Aug-2019 23:40 UT .