24 April 2012
20120423 Week Rotation Today Rotation Week 20120425



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E48N28
(-629",499")
E63-E39
(24)
0.6 2.0 1.2e33
2 E42S76
(-155",-907")
E80-W02
(82)
0.5 1.1 2.3e33
3 W20N23
(297",442")
W12-W26
(14)
0.3 -8.7 -9.5e32

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 24-Apr-2012 23:00 UT .