22 February 2012
⇐20120221 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120223⇒

NOAA
4 Active Regions
11419
11420
11421
11422

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E20S47
(-229",-627") 		E68-W25
(93) 		6.4 3.3 1.0e34
2 E27N45
(-304",762") 		E44-W20
(64) 		1.7 1.1 1.9e33

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-Feb-2012 22:00 UT .