28 August 2017
⇐20170827 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170829⇒

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 E25N46
(-280",601") 		E54-W74
(128) 		16.1 0.7 5.7e33
2 W20S69
(117",-918") 		E10-W36
(46) 		0.3 -1.3 -2.0e33
3 W44S24
(606",-455") 		W38-W51
(13) 		0.2 -0.6 -1.1e32

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 28-Aug-2017 19:30 UT .