22 May 2020
⇐20200521 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20200523⇒

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Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W05S66
(32",-858") 		E62-W60
(122) 		2.9 -1.0 -4.7e21
2 W17N02
(280",65") 		W05-W32
(27) 		1.8 0.1 3.2e19
3 W20N68
(124",888") 		E39-W64
(103) 		0.9 1.1 3.0e21
4 E24S14
(-380",-201") 		E29-E19
(10) 		0.5 0.9 1.1e20
5 W35S30
(479",-448") 		W32-W41
(9) 		0.2 -0.9 -9.4e19
6 W41S12
(606",-172") 		W39-W44
(5) 		0.1 -1.0 -3.4e19
7 W38S16
(564",-235") 		W37-W39
(2) 		0.0 -2.1 -4.0e19
8 W12S15
(195",-215") 		W11-W14
(3) 		0.0 2.0 1.6e19

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 22-May-2020 19:30 UT .