25 January 2013
⇐20130124 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20130126⇒

NOAA
4 Active Regions
11658
11660
11661
11662

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W34S46
(374",-650") 		W07-W44
(37) 		2.2 -2.5 -3.6e33
2 W18N03
(298",144") 		W14-W22
(8) 		0.2 -1.4 -6.3e31
3 W04N10
(64",259") 		E02-W07
(9) 		0.2 -1.1 -4.3e31
4 E31S13
(-495",-148") 		E33-E29
(4) 		0.0 12.1 1.8e32

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 25-Jan-2013 22:00 UT .