20 October 2019
⇐20191019 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20191021⇒

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Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E23N11
(-370",100") 		E45-W08
(53) 		10.0 0.7 1.2e21
2 E04N71
(-20",879") 		E75-W83
(158) 		2.6 1.1 1.1e21
3 W21S65
(147",-907") 		E02-W41
(43) 		0.5 -0.5 -1.5e20
4 W50N04
(738",3") 		W44-W58
(14) 		0.3 -1.0 -7.9e19
5 W45S15
(664",-312") 		W42-W48
(6) 		0.3 -1.7 -1.0e20
6 W45S26
(615",-481") 		W42-W49
(7) 		0.1 -0.4 -9.0e18
7 W46S60
(340",-865") 		W36-W58
(22) 		0.1 -0.7 -3.2e19
8 E42S20
(-601",-400") 		E44-E39
(5) 		0.1 -1.1 -2.0e19

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 20-Oct-2019 23:40 UT .