4 October 2021
⇐20211003 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211005⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E44N59
(-336",782") 		E44-E87
(-43) 		2.1 0.8 5.3e20
2 W23N05
(381",-12") 		W10-W33
(23) 		1.9 0.1 4.1e19
3 E35S03
(-545",-144") 		E51-E18
(33) 		1.6 0.3 1.0e20
4 W57N70
(270",878") 		W92-W90
(-2) 		0.6 1.0 3.2e20
5 E17S65
(-121",-908") 		E45-W06
(51) 		0.6 -0.4 -1.2e20
6 W01S39
(12",-691") 		E07-W07
(14) 		0.2 -1.5 -7.7e19
7 E32N26
(-462",340") 		E36-E28
(8) 		0.1 4.8 1.0e20

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 4-Oct-2021 23:30 UT .