31 March 2023
⇐20230330 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20230401⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W47N04
(708",139") 		W33-W64
(31) 		1.8 -0.5 -2.1e20
2 W05N31
(72",582") 		E08-W13
(21) 		0.9 -6.1 -1.1e21
3 E09S16
(-149",-163") 		E16-E02
(14) 		0.5 -13.5 -1.2e21
4 W07S66
(45",-828") 		E09-W15
(24) 		0.3 -0.6 -4.5e19
5 E03S06
(-48",9") 		E04-E01
(3) 		0.1 -1.8 -3.0e19
6 E24S64
(-169",-814") 		E30-E18
(12) 		0.1 -1.3 -3.6e19
7 W02S08
(31",-17") 		E01-W03
(4) 		0.1 -18.4 -2.2e20
8 W09S07
(142",-12") 		W05-W11
(6) 		0.1 -4.7 -5.2e19

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 31-Mar-2023 23:30 UT .