28 January 2012
⇐20120127 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120129⇒

NOAA
4 Active Regions
11402
11408
11410
11411

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W40S58
(334",-783") 		E65-W62
(127) 		6.6 0.7 5.2e33
2 W15N41
(194",705") 		E01-W35
(36) 		2.6 1.4 2.3e33
3 E35N11
(-553",264") 		E41-E29
(12) 		0.3 -5.2 -5.6e32

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-Jan-2012 22:00 UT .