12 September 2023
⇐20230911 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20230913⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W42S22
(587",-441") 		W31-W55
(24) 		0.7 -9.3 -1.5e21
2 W12N05
(205",-37") 		W07-W18
(11) 		0.6 -5.4 -5.2e20
3 E44S42
(-491",-697") 		E57-E36
(21) 		0.4 4.3 5.2e20
4 E27N65
(-182",814") 		E47-E14
(33) 		0.2 0.6 3.7e19
5 W36N38
(443",508") 		W31-W40
(9) 		0.2 3.0 1.0e20
6 W19N66
(127",822") 		W05-W28
(23) 		0.1 -0.3 -9.7e18
7 W28S11
(442",-292") 		W26-W31
(5) 		0.1 -2.5 -3.0e19
8 W29N41
(352",546") 		W27-W31
(4) 		0.0 2.8 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 12-Sep-2023 23:30 UT .