31 August 2018
⇐20180830 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180901⇒

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 W02N66
(16",811") 		E62-W90
(152) 		5.2 1.2 6.6e21
2 E48S06
(-708",-181") 		E58-E37
(21) 		1.1 -1.3 -9.1e20
3 W32N28
(452",351") 		W28-W35
(7) 		0.1 -1.0 -3.7e19

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 31-Aug-2018 23:10 UT .