19 August 2017
⇐20170818 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170820⇒

NOAA
1 Active Region
12671

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 W47N50
(453",668") 		E54-W71
(125) 		6.7 1.4 9.9e33
2 W05S71
(25",-926") 		E18-W24
(42) 		0.2 -1.4 -1.6e33
3 W16N09
(259",45") 		W15-W17
(2) 		0.1 -0.9 -1.1e31

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 19-Aug-2017 23:30 UT .