27 September 2018
⇐20180926 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180928⇒

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Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E07N68
(-42",837") 		E69-W75
(144) 		4.6 1.3 7.0e21
2 E19N02
(-320",-70") 		E28-E10
(18) 		1.6 0.1 2.1e19
3 E47N02
(-697",-51") 		E57-E39
(18) 		0.6 -1.1 -3.8e20
4 W50S18
(699",-369") 		W45-W55
(10) 		0.1 -1.1 -1.2e20
5 E02S15
(-33",-351") 		E04-W01
(5) 		0.1 -3.2 -6.4e19
6 E23S19
(-354",-411") 		E26-E19
(7) 		0.1 -0.7 -1.6e19
7 W34N14
(524",132") 		W33-W36
(3) 		0.1 -1.4 -3.1e19
8 W20N30
(278",386") 		W17-W22
(5) 		0.0 -0.8 -8.3e18

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-Sep-2018 23:10 UT .