18 January 2019
⇐20190117 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190119⇒

NOAA
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Flare Forecast
Flare Prediction System
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E29N07
(-468",197") 		E59-W00
(59) 		4.9 1.2 1.9e21
2 W15S70
(87",-889") 		E82-W68
(150) 		2.4 -1.1 -4.7e21
3 W18S28
(261",-387") 		W04-W26
(22) 		1.7 -0.2 -7.3e19
4 E25N60
(-206",877") 		E55-E19
(36) 		0.6 0.6 8.3e20
5 W33N63
(241",899") 		W36-W51
(15) 		0.4 0.7 1.1e21
6 W08S19
(131",-241") 		W06-W10
(4) 		0.1 -1.9 -5.1e19
7 W66S53
(540",-754") 		W62-W71
(9) 		0.1 -1.0 -2.5e20

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 18-Jan-2019 20:30 UT .