1 May 2025
⇐20250430 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250502⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E18N42
(-223",689") 		E45-W04
(49) 		1.8 -3.6 -1.5e21
2 E02S04
(-31",-1") 		E09-W07
(16) 		1.1 -4.8 -8.1e20
3 W33N20
(486",375") 		W21-W39
(18) 		1.0 -8.1 -1.5e21
4 W19S19
(292",-252") 		W13-W25
(12) 		0.5 -12.9 -1.1e21
5 E33N31
(-447",545") 		E43-E23
(20) 		0.2 -0.9 -4.7e19
6 E55S30
(-674",-438") 		E64-E47
(17) 		0.2 -3.4 -2.1e20
7 E15S58
(-129",-767") 		E24-W01
(25) 		0.2 0.6 2.8e19
8 E04N14
(-70",294") 		E06-E01
(5) 		0.2 -5.3 -1.3e20
9 E35S51
(-346",-706") 		E40-E29
(11) 		0.1 1.9 5.4e19
10 E68S31
(-757",-465") 		E70-E64
(6) 		0.0 -2.6 -4.6e19
11 W30S12
(468",-132") 		W28-W32
(4) 		0.0 -6.3 -4.3e19

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-May-2025 03:30 UT .