22 September 2017
⇐20170921 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170923⇒

NOAA
2 Active Regions
12680
12681

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 E36N37
(-454",498") 		E68-E12
(56) 		9.1 1.1 5.0e33
2 W22S58
(196",-860") 		E30-W38
(68) 		2.0 -0.8 -3.1e33
3 W55N71
(259",874") 		E17-W77
(94) 		1.2 0.8 3.4e33
4 W26S18
(403",-396") 		W17-W37
(20) 		1.1 -0.7 -3.1e32

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 22-Sep-2017 19:30 UT .