26 April 2021
⇐20210425 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210427⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E11N15
(-174",319") 		E49-W38
(87) 		11.7 0.4 8.0e20
2 W27N60
(213",859") 		E57-W71
(128) 		2.6 0.5 5.3e20
3 E06S74
(-25",-892") 		E57-W42
(99) 		1.0 -1.3 -5.8e20
4 E54S29
(-677",-415") 		E60-E49
(11) 		0.3 1.4 1.3e20
5 W39N08
(592",187") 		W36-W42
(6) 		0.1 -1.1 -1.8e19
6 W33N01
(519",84") 		W30-W35
(5) 		0.1 1.5 1.6e19
7 W43N02
(653",88") 		W41-W45
(4) 		0.1 -1.4 -1.7e19

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 26-Apr-2021 19:30 UT .