25 September 2019
⇐20190924 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190926⇒

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Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W01N44
(17",572") 		E59-W27
(86) 		13.4 1.0 2.4e21
2 E09S27
(-129",-529") 		E12-E04
(8) 		0.3 -0.9 -5.4e19
3 W22N01
(361",-94") 		W18-W27
(9) 		0.2 1.1 4.0e19
4 E27S04
(-427",-165") 		E30-E20
(10) 		0.2 -1.2 -4.0e19
5 E57S07
(-799",-174") 		E62-E53
(9) 		0.1 -0.4 -1.5e19
6 E39S09
(-601",-230") 		E42-E36
(6) 		0.1 -0.5 -5.6e18
7 W24S32
(333",-600") 		W21-W27
(6) 		0.0 0.5 4.2e18
8 W40N01
(610",-72") 		W38-W42
(4) 		0.0 -1.5 -1.1e19

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 25-Sep-2019 23:40 UT .