20 February 2015
20150219 Week Rotation Today Rotation Week 20150221



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W36S66
(234",-838")
E72-W56
(128)
3.2 -1.1 -5.3e33
2 E17S14
(-268",-120")
E25-W09
(34)
1.7 5.2 1.9e33
3 W49N43
(537",717")
W36-W62
(26)
0.8 0.8 1.3e33
4 W30N53
(288",835")
W23-W37
(14)
0.4 0.5 3.2e32

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 20-Feb-2015 22:35 UT .