27 April 2021
⇐20210426 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210428⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E04N11
(-68",255") 		E42-W55
(97) 		14.2 0.3 5.8e20
2 W18N66
(120",895") 		E44-W56
(100) 		1.3 0.5 3.1e20
3 E41S26
(-564",-365") 		E48-E31
(17) 		1.0 0.9 1.9e20
4 W35S76
(134",-906") 		E61-W77
(138) 		0.6 -0.9 -3.2e20
5 E04S23
(-54",-305") 		E09-W09
(18) 		0.5 1.3 1.1e20
6 -776
(-721",E49S03") 		3.7e03
(0.2) 		2.9 -4.4 -1.6e20
7 E42N07
(-634",178") 		E45-E40
(5) 		0.1 -1.4 -2.1e19
8 W43N02
(648",90") 		W41-W45
(4) 		0.1 -0.7 -7.8e18
9 W17N19
(262",375") 		W15-W19
(4) 		0.0 -2.8 -2.4e19
10 E07S13
(-113",-148") 		E09-E05
(4) 		0.0 -3.6 -2.2e19

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-Apr-2021 19:30 UT .