19 December 2021
20211218 Week Rotation Today Rotation Week 20211220



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W19S08
(320",-105")
E24-W60
(84)
8.1 -1.1 -1.4e21
2 W31S64
(220",-867")
E47-W75
(122)
3.1 -0.8 -9.8e20
3 E63N58
(-458",836")
E64-E52
(12)
0.1 -0.3 -3.0e19
4 W35S43
(415",-649")
W34-W37
(3)
0.1 -1.3 -2.1e19
5 W57S00
(816",7")
W53-W60
(7)
0.1 -0.6 -1.0e19

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-Dec-2021 20:30 UT .