21 September 2020
⇐20200920 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20200922⇒

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Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E10N50
(-110",657") 		E47-W41
(88) 		15.3 0.5 1.5e21
2 E60N37
(-661",523") 		E71-E49
(22) 		0.5 0.8 1.3e20
3 W20N15
(324",133") 		W17-W25
(8) 		0.2 0.8 2.9e19
4 W31S66
(201",-909") 		W19-W51
(32) 		0.2 -0.7 -7.2e19
5 W09S15
(146",-364") 		W07-W11
(4) 		0.1 1.6 2.2e19
6 W16N35
(222",451") 		W14-W19
(5) 		0.0 -1.1 -8.1e18
7 W15S04
(240",-181") 		W13-W16
(3) 		0.0 1.2 7.5e18

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 21-Sep-2020 23:30 UT .