22 September 2023
⇐20230921 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20230923⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W28N45
(321",597") 		E03-W66
(69) 		2.7 -2.7 -1.6e21
2 W53N61
(366",798") 		W33-W62
(29) 		0.3 -0.3 -3.5e19
3 W04N31
(57",393") 		E01-W07
(8) 		0.3 -2.3 -9.7e19
4 E17N45
(-204",588") 		E25-E12
(13) 		0.1 -2.8 -7.8e19
5 W52N05
(753",13") 		W50-W55
(5) 		0.1 -1.2 -3.1e19
6 W25N56
(223",731") 		W20-W31
(11) 		0.1 -0.7 -1.3e19
7 E32N50
(-327",667") 		E32-E32
(8.6e02) 		-2.0 3.4 2.9e19

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 22-Sep-2023 23:30 UT .