18 August 2015
⇐20150817 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20150819⇒

NOAA
4 Active Regions
12401
12398
12399
12400

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W04N48
(45",628") 		E27-W33
(60) 		10.5 1.3 6.1e33
2 E33S09
(-517",-233") 		E47-E24
(23) 		1.8 4.0 2.7e33
3 E22S69
(-125",-916") 		E37-E11
(26) 		0.1 -0.7 -4.0e32

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 18-Aug-2015 23:35 UT .