30 April 2023
⇐20230429 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20230501⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E35S42
(-411",-589") 		E48-E08
(40) 		2.7 2.7 1.7e21
2 W41N30
(540",522") 		W22-W57
(35) 		1.2 -4.7 -1.5e21
3 E52N07
(-748",157") 		E60-E48
(12) 		0.3 0.9 7.5e19
4 W15N32
(205",562") 		W11-W19
(8) 		0.1 -2.3 -5.6e19
5 W69S09
(877",-120") 		W65-W73
(8) 		0.1 -1.9 -5.1e19
6 W27N61
(209",865") 		W21-W31
(10) 		0.0 -0.4 -8.5e18
7 W11N43
(137",703") 		W09-W13
(4) 		0.0 -2.7 -3.0e19
8 W38N56
(335",815") 		W34-W40
(6) 		0.0 1.6 2.2e19

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 30-Apr-2023 23:30 UT .