18 August 2012
⇐20120817 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120819⇒

NOAA
4 Active Regions
11543
11546
11547
11548

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W30S16
(463",-348") 		W23-W39
(16) 		1.7 2.1 1.4e33
2 E15S41
(-187",-696") 		E22-W04
(26) 		1.4 1.8 1.6e33
3 W16N54
(156",703") 		E05-W31
(36) 		1.2 0.7 5.5e32
4 E37N54
(-333",714") 		E39-E20
(19) 		0.9 0.6 4.5e32

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-2012 23:00 UT .