5 February 2019
⇐20190204 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190206⇒

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Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E04S29
(-52",-372") 		E43-W31
(74) 		9.2 -0.3 -7.2e20
2 E13S67
(-87",-852") 		E61-W80
(141) 		3.7 -0.9 -4.0e21
3 W04N08
(74",234") 		E12-W18
(30) 		3.4 -0.3 -2.1e20
4 W28N12
(446",289") 		W21-W34
(13) 		0.4 -0.7 -9.0e19
5 W38N07
(594",207") 		W34-W42
(8) 		0.2 -1.1 -8.2e19
6 W56N07
(798",177") 		W51-W61
(10) 		0.2 -1.8 -2.5e20
7 E12N48
(-136",788") 		E16-E09
(7) 		0.1 -0.6 -5.6e19
8 W28N02
(453",125") 		W25-W30
(5) 		0.0 -0.7 -7.4e18

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 5-Feb-2019 20:30 UT .