27 April 2023
20230426 Week Rotation Today Rotation Week 20230428



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W40S08
(604",-74")
W12-W59
(47)
4.2 -1.7 -1.4e21
2 E06N35
(-85",612")
E29-W20
(49)
2.5 -5.7 -2.9e21
3 W61S58
(434",-791")
W57-W83
(26)
1.0 -0.7 -3.3e20
4 W32N37
(398",626")
W27-W36
(9)
0.1 -2.8 -7.2e19
5 E26N31
(-363",545")
E31-E21
(10)
0.1 -1.2 -1.5e19
6 W44N07
(660",167")
W42-W46
(4)
0.0 -2.2 -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 27-Apr-2023 23:30 UT .