23 January 2023
⇐20230122 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20230124⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W30S07
(489",-45") 		W17-W43
(26) 		2.5 2.3 1.0e21
2 W25S74
(112",-912") 		E17-W73
(90) 		1.0 -0.5 -2.4e20
3 E07N14
(-117",316") 		E11-W05
(16) 		0.9 3.0 4.5e20
4 E29N45
(-333",747") 		E39-E20
(19) 		0.3 0.5 4.2e19
5 W06S09
(97",-65") 		W03-W08
(5) 		0.3 -1.5 -6.7e19
6 W13N04
(215",158") 		W10-W15
(5) 		0.1 -1.4 -2.0e19
7 E28S02
(-452",41") 		E31-E25
(6) 		0.1 0.8 1.1e19
8 E49N02
(-742",98") 		E52-E47
(5) 		0.1 -1.5 -1.8e19
9 E04S09
(-70",-55") 		E05-E03
(2) 		0.0 3.8 2.1e19

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 23-Jan-2023 20:30 UT .