16 January 2019
⇐20190115 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190117⇒

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Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W18S23
(282",-316") 		E17-W42
(59) 		5.8 -0.2 -3.1e20
2 W27S66
(179",-859") 		E81-W60
(141) 		3.8 -1.0 -5.6e21
3 E49N01
(-743",64") 		E64-E36
(28) 		0.9 1.3 7.3e20
4 E03N64
(-25",912") 		E28-W35
(63) 		0.7 1.0 1.7e21
5 E22S17
(-348",-207") 		E24-E19
(5) 		0.1 -1.3 -3.9e19
6 W55S30
(687",-453") 		W50-W58
(8) 		0.1 -0.5 -2.9e19
7 W20S47
(232",-658") 		W18-W22
(4) 		0.0 -0.7 -1.5e19
8 W24S33
(327",-473") 		W22-W26
(4) 		0.0 -0.7 -9.6e18

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 16-Jan-2019 20:30 UT .