21 April 2015
20150420 Week Rotation Today Rotation Week 20150422



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E42S73
(-192",-889")
E84-W76
(160)
1.0 -0.4 -1.2e33
2 W43S20
(610",-261")
W35-W49
(14)
1.0 3.8 1.9e33
3 E20N31
(-284",565")
E23-E18
(5)
0.1 -4.2 -1.7e32

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 21-Apr-2015 23:35 UT .