1 March 2025
⇐20250228 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250302⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W55S34
(658",-484") 		W29-W84
(55) 		2.3 2.6 1.7e21
2 W57S03
(815",22") 		W48-W75
(27) 		1.5 2.5 1.1e21
3 W57S60
(399",-803") 		W37-W78
(41) 		1.3 0.5 2.6e20
4 W52N27
(676",505") 		W43-W60
(17) 		0.6 2.7 5.1e20
5 E68N18
(-854",336") 		E74-E59
(15) 		0.3 -2.1 -2.8e20
6 W11S50
(115",-661") 		W07-W14
(7) 		0.1 -2.2 -4.4e19
7 W13N11
(215",298") 		W10-W16
(6) 		0.1 9.4 1.0e20
8 E64N08
(-860",187") 		E66-E60
(6) 		0.1 -1.4 -2.8e19

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 1-Mar-2025 20:30 UT .