8 April 2025
⇐20250407 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20250409⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W08S33
(117",-434") 		E31-W27
(58) 		3.6 -5.0 -3.1e21
2 W38S01
(588",57") 		W30-W46
(16) 		0.7 -7.5 -9.8e20
3 W31S39
(379",-534") 		W26-W37
(11) 		0.2 -1.4 -4.7e19
4 W05S52
(48",-693") 		W01-W08
(7) 		0.1 5.7 8.6e19
5 E33S38
(-409",-526") 		E36-E29
(7) 		0.1 -3.2 -4.5e19
6 W61N13
(815",261") 		W58-W64
(6) 		0.0 -4.4 -7.1e19
7 E17N53
(-172",822") 		E22-E12
(10) 		0.0 -1.1 -1.4e19
8 W22N54
(210",827") 		W18-W25
(7) 		0.0 -1.4 -1.6e19

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 8-Apr-2025 23:30 UT .