18 October 2023
20231017 Week Rotation Today Rotation Week 20231019



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E20N46
(-230",623")
E34-E03
(31)
1.1 -3.3 -8.0e20
2 W37S06
(580",-174")
W34-W40
(6)
0.1 -3.2 -8.7e19
3 E00N50
(-1",670")
E03-W04
(7)
0.1 -2.9 -4.0e19
4 W08N58
(75",761")
W05-W13
(8)
0.1 -1.4 -1.8e19

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 18-Oct-2023 23:30 UT .