21 August 2017
⇐20170820 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170822⇒

NOAA
2 Active Regions
12671
12672

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 W23N67
(145",828") 		E81-W65
(146) 		3.1 0.9 3.6e33
2 W67N38
(690",540") 		W60-W77
(17) 		0.3 1.7 1.1e33
3 W16S71
(87",-924") 		W09-W27
(18) 		0.1 -1.9 -7.7e32
4 W32S69
(175",-915") 		W26-W43
(17) 		0.0 -1.7 -7.7e32
5 E07S21
(-101",-450") 		E08-E05
(3) 		0.0 -1.0 -1.2e31

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-Aug-2017 23:30 UT .