1 February 2012
⇐20120131 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120202⇒

NOAA
4 Active Regions
11408
11410
11411
11413

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E11S19
(-181",-217") 		E20-W06
(26) 		1.3 -2.2 -6.1e32
2 W44S74
(184",-912") 		E50-W85
(135) 		0.9 0.7 2.1e33
3 W10N12
(169",298") 		W04-W19
(15) 		0.7 -15.9 -2.7e33

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 1-Feb-2012 22:00 UT .