30 August 2020
⇐20200829 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20200831⇒

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Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W18N56
(163",724") 		E90-W35
(125) 		6.8 0.8 1.4e21
2 E28S06
(-440",-195") 		E37-E18
(19) 		1.4 -0.1 -1.9e19
3 W54N25
(696",330") 		W48-W63
(15) 		0.2 -0.3 -1.5e19
4 W16S15
(250",-354") 		W13-W19
(6) 		0.1 -1.0 -2.3e19
5 W19S05
(313",-196") 		W18-W21
(3) 		0.1 -2.4 -3.1e19
6 W34N08
(530",37") 		W32-W37
(5) 		0.1 -0.6 -7.6e18
7 E02S01
(-38",-133") 		E04-E01
(3) 		0.0 1.5 9.7e18

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-Aug-2020 19:00 UT .