21 October 2019
⇐20191020 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20191022⇒

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 E11N11
(-176",104") 		E36-W20
(56) 		11.2 1.0 1.6e21
2 E05N70
(-28",873") 		E73-W83
(156) 		2.9 1.3 1.3e21
3 W38S67
(234",-910") 		W25-W51
(26) 		0.2 -0.5 -5.0e19
4 W13S72
(69",-940") 		W03-W24
(21) 		0.0 -0.5 -2.0e19
5 E01N55
(-9",741") 		E02-W01
(3) 		0.0 -0.9 -7.2e18

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-Oct-2019 23:40 UT .