19 April 2024
20240418 Week Rotation Today Rotation Week 20240420



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E40S05
(-615",-17")
E48-E32
(16)
0.7 3.7 5.1e20
2 W36S17
(536",-211")
W28-W41
(13)
0.4 -3.4 -2.4e20
3 E46N49
(-444",763")
E71-E29
(42)
0.3 -1.1 -1.2e20
4 E77S34
(-774",-510")
E78-E76
(2)
0.1 5.6 1.9e20

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 19-Apr-2024 23:30 UT .